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Circuit relay v2 (#717)

This commit is contained in:
lchenut 2022-08-01 14:31:22 +02:00 committed by GitHub
parent 1e598a0239
commit 34c2fb8787
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26 changed files with 2139 additions and 885 deletions
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76
examples/circuitrelay.nim Normal file
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@ -0,0 +1,76 @@
import chronos, stew/byteutils
import ../libp2p,
../libp2p/protocols/relay/[relay, client]
# Helper to create a circuit relay node
proc createCircuitRelaySwitch(r: Relay): Switch =
SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
.withTcpTransport()
.withMplex()
.withNoise()
.withCircuitRelay(r)
.build()
proc main() {.async.} =
# Create a custom protocol
let customProtoCodec = "/test"
var proto = new LPProtocol
proto.codec = customProtoCodec
proto.handler = proc(conn: Connection, proto: string) {.async.} =
var msg = string.fromBytes(await conn.readLp(1024))
echo "1 - Dst Received: ", msg
assert "test1" == msg
await conn.writeLp("test2")
msg = string.fromBytes(await conn.readLp(1024))
echo "2 - Dst Received: ", msg
assert "test3" == msg
await conn.writeLp("test4")
let
relay = Relay.new()
clSrc = RelayClient.new()
clDst = RelayClient.new()
# Create three hosts, enable relay client on two of them.
# The third one can relay connections for other peers.
# RelayClient can use a relay, Relay is a relay.
swRel = createCircuitRelaySwitch(relay)
swSrc = createCircuitRelaySwitch(clSrc)
swDst = createCircuitRelaySwitch(clDst)
# Create a relay address to swDst using swRel as the relay
addrs = MultiAddress.init($swRel.peerInfo.addrs[0] & "/p2p/" &
$swRel.peerInfo.peerId & "/p2p-circuit/p2p/" &
$swDst.peerInfo.peerId).get()
swDst.mount(proto)
await swRel.start()
await swSrc.start()
await swDst.start()
# Connect both Src and Dst to the relay, but not to each other.
await swSrc.connect(swRel.peerInfo.peerId, swRel.peerInfo.addrs)
await swDst.connect(swRel.peerInfo.peerId, swRel.peerInfo.addrs)
# Dst reserve a slot on the relay.
let rsvp = await clDst.reserve(swRel.peerInfo.peerId, swRel.peerInfo.addrs)
# Src dial Dst using the relay
let conn = await swSrc.dial(swDst.peerInfo.peerId, @[ addrs ], customProtoCodec)
await conn.writeLp("test1")
var msg = string.fromBytes(await conn.readLp(1024))
echo "1 - Src Received: ", msg
assert "test2" == msg
await conn.writeLp("test3")
msg = string.fromBytes(await conn.readLp(1024))
echo "2 - Src Received: ", msg
assert "test4" == msg
await relay.stop()
await allFutures(swSrc.stop(), swDst.stop(), swRel.stop())
waitFor(main())

1
libp2p.nimble
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@ -103,6 +103,7 @@ task test_slim, "Runs the (slimmed down) test suite":
task examples_build, "Build the samples":
buildSample("directchat")
buildSample("helloworld", true)
buildSample("circuitrelay", true)
buildTutorial("examples/tutorial_1_connect.md")
buildTutorial("examples/tutorial_2_customproto.md")

23
libp2p/builders.nim
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@ -23,7 +23,8 @@ import
switch, peerid, peerinfo, stream/connection, multiaddress,
crypto/crypto, transports/[transport, tcptransport],
muxers/[muxer, mplex/mplex, yamux/yamux],
protocols/[identify, secure/secure, secure/noise, relay],
protocols/[identify, secure/secure, secure/noise],
protocols/relay/[relay, client, rtransport],
connmanager, upgrademngrs/muxedupgrade,
nameresolving/nameresolver,
errors, utility
@ -54,8 +55,7 @@ type
agentVersion: string
nameResolver: NameResolver
peerStoreCapacity: Option[int]
isCircuitRelay: bool
circuitRelayCanHop: bool
circuitRelay: Relay
proc new*(T: type[SwitchBuilder]): T {.public.} =
## Creates a SwitchBuilder
@ -73,8 +73,7 @@ proc new*(T: type[SwitchBuilder]): T {.public.} =
maxOut: -1,
maxConnsPerPeer: MaxConnectionsPerPeer,
protoVersion: ProtoVersion,
agentVersion: AgentVersion,
isCircuitRelay: false)
agentVersion: AgentVersion)
proc withPrivateKey*(b: SwitchBuilder, privateKey: PrivateKey): SwitchBuilder {.public.} =
## Set the private key of the switch. Will be used to
@ -183,9 +182,8 @@ proc withNameResolver*(b: SwitchBuilder, nameResolver: NameResolver): SwitchBuil
b.nameResolver = nameResolver
b
proc withRelayTransport*(b: SwitchBuilder, canHop: bool): SwitchBuilder =
b.isCircuitRelay = true
b.circuitRelayCanHop = canHop
proc withCircuitRelay*(b: SwitchBuilder, r: Relay = Relay.new()): SwitchBuilder =
b.circuitRelay = r
b
proc build*(b: SwitchBuilder): Switch
@ -245,10 +243,11 @@ proc build*(b: SwitchBuilder): Switch
nameResolver = b.nameResolver,
peerStore = peerStore)
if b.isCircuitRelay:
let relay = Relay.new(switch, b.circuitRelayCanHop)
switch.mount(relay)
switch.addTransport(RelayTransport.new(relay, muxedUpgrade))
if not isNil(b.circuitRelay):
if b.circuitRelay of RelayClient:
switch.addTransport(RelayTransport.new(RelayClient(b.circuitRelay), muxedUpgrade))
b.circuitRelay.setup(switch)
switch.mount(b.circuitRelay)
return switch

6
libp2p/multistream.nim
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@ -76,7 +76,7 @@ proc select*(m: MultistreamSelect,
trace "reading first requested proto", conn
if s == proto[0]:
trace "successfully selected ", conn, proto = proto[0]
conn.tag = proto[0]
conn.protocol = proto[0]
return proto[0]
elif proto.len > 1:
# Try to negotiate alternatives
@ -89,7 +89,7 @@ proc select*(m: MultistreamSelect,
validateSuffix(s)
if s == p:
trace "selected protocol", conn, protocol = s
conn.tag = s
conn.protocol = s
return s
return ""
else:
@ -167,7 +167,7 @@ proc handle*(m: MultistreamSelect, conn: Connection, active: bool = false) {.asy
if (not isNil(h.match) and h.match(ms)) or h.protos.contains(ms):
trace "found handler", conn, protocol = ms
await conn.writeLp(ms & "\n")
conn.tag = ms
conn.protocol = ms
await h.protocol.handler(conn, ms)
return
debug "no handlers", conn, protocol = ms

10
libp2p/muxers/mplex/lpchannel.nim
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@ -168,8 +168,8 @@ method readOnce*(s: LPChannel,
try:
let bytes = await procCall BufferStream(s).readOnce(pbytes, nbytes)
when defined(libp2p_network_protocols_metrics):
if s.tag.len > 0:
libp2p_protocols_bytes.inc(bytes.int64, labelValues=[s.tag, "in"])
if s.protocol.len > 0:
libp2p_protocols_bytes.inc(bytes.int64, labelValues=[s.protocol, "in"])
trace "readOnce", s, bytes
if bytes == 0:
@ -219,8 +219,8 @@ proc completeWrite(
await fut
when defined(libp2p_network_protocol_metrics):
if s.tag.len > 0:
libp2p_protocols_bytes.inc(msgLen.int64, labelValues=[s.tag, "out"])
if s.protocol.len > 0:
libp2p_protocols_bytes.inc(msgLen.int64, labelValues=[s.protocol, "out"])
s.activity = true
except CancelledError as exc:
@ -254,6 +254,8 @@ method write*(s: LPChannel, msg: seq[byte]): Future[void] =
s.completeWrite(fut, msg.len)
method getWrapped*(s: LPChannel): Connection = s.conn
proc init*(
L: type LPChannel,
id: uint64,

4
libp2p/protocols/pubsub/pubsub.nim
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@ -286,8 +286,8 @@ proc getOrCreatePeer*(
p.peers.withValue(peerId, peer):
return peer[]
proc getConn(): Future[Connection] =
p.switch.dial(peerId, protos)
proc getConn(): Future[Connection] {.async.} =
return await p.switch.dial(peerId, protos)
proc dropConn(peer: PubSubPeer) =
proc dropConnAsync(peer: PubSubPeer) {.async.} =

489
libp2p/protocols/relay.nim
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@ -1,489 +0,0 @@
# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import options
import sequtils, strutils, tables
import chronos, chronicles
import ../peerinfo,
../switch,
../multiaddress,
../stream/connection,
../protocols/protocol,
../transports/transport,
../utility,
../errors
const
RelayCodec* = "/libp2p/circuit/relay/0.1.0"
MsgSize* = 4096
MaxCircuit* = 1024
MaxCircuitPerPeer* = 64
logScope:
topics = "libp2p relay"
type
RelayType* = enum
Hop = 1
Stop = 2
Status = 3
CanHop = 4
RelayStatus* = enum
Success = 100
HopSrcAddrTooLong = 220
HopDstAddrTooLong = 221
HopSrcMultiaddrInvalid = 250
HopDstMultiaddrInvalid = 251
HopNoConnToDst = 260
HopCantDialDst = 261
HopCantOpenDstStream = 262
HopCantSpeakRelay = 270
HopCantRelayToSelf = 280
StopSrcAddrTooLong = 320
StopDstAddrTooLong = 321
StopSrcMultiaddrInvalid = 350
StopDstMultiaddrInvalid = 351
StopRelayRefused = 390
MalformedMessage = 400
RelayError* = object of LPError
RelayPeer* = object
peerId*: PeerId
addrs*: seq[MultiAddress]
AddConn* = proc(conn: Connection): Future[void] {.gcsafe, raises: [Defect].}
RelayMessage* = object
msgType*: Option[RelayType]
srcPeer*: Option[RelayPeer]
dstPeer*: Option[RelayPeer]
status*: Option[RelayStatus]
Relay* = ref object of LPProtocol
switch*: Switch
peerId: PeerId
dialer: Dial
canHop: bool
streamCount: int
hopCount: CountTable[PeerId]
addConn: AddConn
maxCircuit*: int
maxCircuitPerPeer*: int
msgSize*: int
proc encodeMsg*(msg: RelayMessage): ProtoBuffer =
result = initProtoBuffer()
if isSome(msg.msgType):
result.write(1, msg.msgType.get().ord.uint)
if isSome(msg.srcPeer):
var peer = initProtoBuffer()
peer.write(1, msg.srcPeer.get().peerId)
for ma in msg.srcPeer.get().addrs:
peer.write(2, ma.data.buffer)
peer.finish()
result.write(2, peer.buffer)
if isSome(msg.dstPeer):
var peer = initProtoBuffer()
peer.write(1, msg.dstPeer.get().peerId)
for ma in msg.dstPeer.get().addrs:
peer.write(2, ma.data.buffer)
peer.finish()
result.write(3, peer.buffer)
if isSome(msg.status):
result.write(4, msg.status.get().ord.uint)
result.finish()
proc decodeMsg*(buf: seq[byte]): Option[RelayMessage] =
var
rMsg: RelayMessage
msgTypeOrd: uint32
src: RelayPeer
dst: RelayPeer
statusOrd: uint32
pbSrc: ProtoBuffer
pbDst: ProtoBuffer
let
pb = initProtoBuffer(buf)
r1 = pb.getField(1, msgTypeOrd)
r2 = pb.getField(2, pbSrc)
r3 = pb.getField(3, pbDst)
r4 = pb.getField(4, statusOrd)
if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr():
return none(RelayMessage)
if r2.get() and
(pbSrc.getField(1, src.peerId).isErr() or
pbSrc.getRepeatedField(2, src.addrs).isErr()):
return none(RelayMessage)
if r3.get() and
(pbDst.getField(1, dst.peerId).isErr() or
pbDst.getRepeatedField(2, dst.addrs).isErr()):
return none(RelayMessage)
if r1.get(): rMsg.msgType = some(RelayType(msgTypeOrd))
if r2.get(): rMsg.srcPeer = some(src)
if r3.get(): rMsg.dstPeer = some(dst)
if r4.get(): rMsg.status = some(RelayStatus(statusOrd))
some(rMsg)
proc sendStatus*(conn: Connection, code: RelayStatus) {.async, gcsafe.} =
trace "send status", status = $code & "(" & $ord(code) & ")"
let
msg = RelayMessage(
msgType: some(RelayType.Status),
status: some(code))
pb = encodeMsg(msg)
await conn.writeLp(pb.buffer)
proc handleHopStream(r: Relay, conn: Connection, msg: RelayMessage) {.async, gcsafe.} =
r.streamCount.inc()
defer:
r.streamCount.dec()
if r.streamCount > r.maxCircuit:
trace "refusing connection; too many active circuit"
await sendStatus(conn, RelayStatus.HopCantSpeakRelay)
return
proc checkMsg(): Result[RelayMessage, RelayStatus] =
if not r.canHop:
return err(RelayStatus.HopCantSpeakRelay)
if msg.srcPeer.isNone:
return err(RelayStatus.HopSrcMultiaddrInvalid)
let src = msg.srcPeer.get()
if src.peerId != conn.peerId:
return err(RelayStatus.HopSrcMultiaddrInvalid)
if msg.dstPeer.isNone:
return err(RelayStatus.HopDstMultiaddrInvalid)
let dst = msg.dstPeer.get()
if dst.peerId == r.switch.peerInfo.peerId:
return err(RelayStatus.HopCantRelayToSelf)
if not r.switch.isConnected(dst.peerId):
trace "relay not connected to dst", dst
return err(RelayStatus.HopNoConnToDst)
ok(msg)
let check = checkMsg()
if check.isErr:
await sendStatus(conn, check.error())
return
let
src = msg.srcPeer.get()
dst = msg.dstPeer.get()
# TODO: if r.acl # access control list
# and not r.acl.AllowHop(src.peerId, dst.peerId)
# sendStatus(conn, RelayStatus.HopCantSpeakRelay)
r.hopCount.inc(src.peerId)
r.hopCount.inc(dst.peerId)
defer:
r.hopCount.inc(src.peerId, -1)
r.hopCount.inc(dst.peerId, -1)
if r.hopCount[src.peerId] > r.maxCircuitPerPeer:
trace "refusing connection; too many connection from src", src, dst
await sendStatus(conn, RelayStatus.HopCantSpeakRelay)
return
if r.hopCount[dst.peerId] > r.maxCircuitPerPeer:
trace "refusing connection; too many connection to dst", src, dst
await sendStatus(conn, RelayStatus.HopCantSpeakRelay)
return
let connDst = try:
await r.switch.dial(dst.peerId, @[RelayCodec])
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error opening relay stream", dst, exc=exc.msg
await sendStatus(conn, RelayStatus.HopCantDialDst)
return
defer:
await connDst.close()
let msgToSend = RelayMessage(
msgType: some(RelayType.Stop),
srcPeer: some(src),
dstPeer: some(dst),
status: none(RelayStatus))
let msgRcvFromDstOpt = try:
await connDst.writeLp(encodeMsg(msgToSend).buffer)
decodeMsg(await connDst.readLp(r.msgSize))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error writing stop handshake or reading stop response", exc=exc.msg
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
return
if msgRcvFromDstOpt.isNone:
trace "error reading stop response", msg = msgRcvFromDstOpt
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
return
let msgRcvFromDst = msgRcvFromDstOpt.get()
if msgRcvFromDst.msgType.isNone or msgRcvFromDst.msgType.get() != RelayType.Status:
trace "unexcepted relay stop response", msgType = msgRcvFromDst.msgType
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
return
if msgRcvFromDst.status.isNone or msgRcvFromDst.status.get() != RelayStatus.Success:
trace "relay stop failure", status=msgRcvFromDst.status
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
return
await sendStatus(conn, RelayStatus.Success)
trace "relaying connection", src, dst
proc bridge(conn: Connection, connDst: Connection) {.async.} =
const bufferSize = 4096
var
bufSrcToDst: array[bufferSize, byte]
bufDstToSrc: array[bufferSize, byte]
futSrc = conn.readOnce(addr bufSrcToDst[0], bufSrcToDst.high + 1)
futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.high + 1)
bytesSendFromSrcToDst = 0
bytesSendFromDstToSrc = 0
bufRead: int
while not conn.closed() and not connDst.closed():
try:
await futSrc or futDst
if futSrc.finished():
bufRead = await futSrc
bytesSendFromSrcToDst.inc(bufRead)
await connDst.write(@bufSrcToDst[0..<bufRead])
zeroMem(addr(bufSrcToDst), bufSrcToDst.high + 1)
futSrc = conn.readOnce(addr bufSrcToDst[0], bufSrcToDst.high + 1)
if futDst.finished():
bufRead = await futDst
bytesSendFromDstToSrc += bufRead
await conn.write(bufDstToSrc[0..<bufRead])
zeroMem(addr(bufDstToSrc), bufDstToSrc.high + 1)
futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.high + 1)
except CancelledError as exc:
raise exc
except CatchableError as exc:
if conn.closed() or conn.atEof():
trace "relay src closed connection", src
if connDst.closed() or connDst.atEof():
trace "relay dst closed connection", dst
trace "relay error", exc=exc.msg
break
trace "end relaying", bytesSendFromSrcToDst, bytesSendFromDstToSrc
await futSrc.cancelAndWait()
await futDst.cancelAndWait()
await bridge(conn, connDst)
proc handleStopStream(r: Relay, conn: Connection, msg: RelayMessage) {.async, gcsafe.} =
if msg.srcPeer.isNone:
await sendStatus(conn, RelayStatus.StopSrcMultiaddrInvalid)
return
let src = msg.srcPeer.get()
if msg.dstPeer.isNone:
await sendStatus(conn, RelayStatus.StopDstMultiaddrInvalid)
return
let dst = msg.dstPeer.get()
if dst.peerId != r.switch.peerInfo.peerId:
await sendStatus(conn, RelayStatus.StopDstMultiaddrInvalid)
return
trace "get a relay connection", src, conn
if r.addConn == nil:
await sendStatus(conn, RelayStatus.StopRelayRefused)
await conn.close()
return
await sendStatus(conn, RelayStatus.Success)
# This sound redundant but the callback could, in theory, be set to nil during
# sendStatus(Success) so it's safer to double check
if r.addConn != nil: await r.addConn(conn)
else: await conn.close()
proc handleCanHop(r: Relay, conn: Connection, msg: RelayMessage) {.async, gcsafe.} =
await sendStatus(conn,
if r.canHop:
RelayStatus.Success
else:
RelayStatus.HopCantSpeakRelay
)
proc new*(T: typedesc[Relay], switch: Switch, canHop: bool): T =
let relay = T(switch: switch, canHop: canHop)
relay.init()
relay
method init*(r: Relay) =
proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
try:
let msgOpt = decodeMsg(await conn.readLp(r.msgSize))
if msgOpt.isNone:
await sendStatus(conn, RelayStatus.MalformedMessage)
return
else:
trace "relay handle stream", msg = msgOpt.get()
let msg = msgOpt.get()
case msg.msgType.get:
of RelayType.Hop: await r.handleHopStream(conn, msg)
of RelayType.Stop: await r.handleStopStream(conn, msg)
of RelayType.CanHop: await r.handleCanHop(conn, msg)
else:
trace "Unexpected relay handshake", msgType=msg.msgType
await sendStatus(conn, RelayStatus.MalformedMessage)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "exception in relay handler", exc = exc.msg, conn
finally:
trace "exiting relay handler", conn
await conn.close()
r.handler = handleStream
r.codecs = @[RelayCodec]
r.maxCircuit = MaxCircuit
r.maxCircuitPerPeer = MaxCircuitPerPeer
r.msgSize = MsgSize
proc dialPeer(
r: Relay,
conn: Connection,
dstPeerId: PeerId,
dstAddrs: seq[MultiAddress]): Future[Connection] {.async.} =
var
msg = RelayMessage(
msgType: some(RelayType.Hop),
srcPeer: some(RelayPeer(peerId: r.switch.peerInfo.peerId, addrs: r.switch.peerInfo.addrs)),
dstPeer: some(RelayPeer(peerId: dstPeerId, addrs: dstAddrs)),
status: none(RelayStatus))
pb = encodeMsg(msg)
trace "Dial peer", msgSend=msg
try:
await conn.writeLp(pb.buffer)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error writing hop request", exc=exc.msg
raise exc
let msgRcvFromRelayOpt = try:
decodeMsg(await conn.readLp(r.msgSize))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error reading stop response", exc=exc.msg
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
raise exc
if msgRcvFromRelayOpt.isNone:
trace "error reading stop response", msg = msgRcvFromRelayOpt
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
raise newException(RelayError, "Hop can't open destination stream")
let msgRcvFromRelay = msgRcvFromRelayOpt.get()
if msgRcvFromRelay.msgType.isNone or msgRcvFromRelay.msgType.get() != RelayType.Status:
trace "unexcepted relay stop response", msgType = msgRcvFromRelay.msgType
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
raise newException(RelayError, "Hop can't open destination stream")
if msgRcvFromRelay.status.isNone or msgRcvFromRelay.status.get() != RelayStatus.Success:
trace "relay stop failure", status=msgRcvFromRelay.status
await sendStatus(conn, RelayStatus.HopCantOpenDstStream)
raise newException(RelayError, "Hop can't open destination stream")
result = conn
#
# Relay Transport
#
type
RelayTransport* = ref object of Transport
relay*: Relay
queue: AsyncQueue[Connection]
relayRunning: bool
method start*(self: RelayTransport, ma: seq[MultiAddress]) {.async.} =
if self.relayRunning:
trace "Relay transport already running"
return
await procCall Transport(self).start(ma)
self.relayRunning = true
self.relay.addConn = proc(conn: Connection) {.async, gcsafe, raises: [Defect].} =
await self.queue.addLast(conn)
await conn.join()
trace "Starting Relay transport"
method stop*(self: RelayTransport) {.async, gcsafe.} =
self.running = false
self.relayRunning = false
self.relay.addConn = nil
while not self.queue.empty():
await self.queue.popFirstNoWait().close()
method accept*(self: RelayTransport): Future[Connection] {.async, gcsafe.} =
result = await self.queue.popFirst()
proc dial*(self: RelayTransport, ma: MultiAddress): Future[Connection] {.async, gcsafe.} =
let
sma = toSeq(ma.items())
relayAddrs = sma[0..sma.len-4].mapIt(it.tryGet()).foldl(a & b)
var
relayPeerId: PeerId
dstPeerId: PeerId
if not relayPeerId.init(($(sma[^3].get())).split('/')[2]):
raise newException(RelayError, "Relay doesn't exist")
if not dstPeerId.init(($(sma[^1].get())).split('/')[2]):
raise newException(RelayError, "Destination doesn't exist")
trace "Dial", relayPeerId, relayAddrs, dstPeerId
let conn = await self.relay.switch.dial(relayPeerId, @[ relayAddrs ], RelayCodec)
conn.dir = Direction.Out
result = await self.relay.dialPeer(conn, dstPeerId, @[])
method dial*(
self: RelayTransport,
hostname: string,
address: MultiAddress): Future[Connection] {.async, gcsafe.} =
result = await self.dial(address)
method handles*(self: RelayTransport, ma: MultiAddress): bool {.gcsafe} =
if ma.protocols.isOk:
let sma = toSeq(ma.items())
if sma.len >= 3:
result = CircuitRelay.match(sma[^2].get()) and
P2PPattern.match(sma[^1].get())
trace "Handles return", ma, result
proc new*(T: typedesc[RelayTransport], relay: Relay, upgrader: Upgrade): T =
result = T(relay: relay, upgrader: upgrader)
result.running = true
result.queue = newAsyncQueue[Connection](0)

291
libp2p/protocols/relay/client.nim Normal file
View File

@ -0,0 +1,291 @@
# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import times, options
import chronos, chronicles
import ./relay,
./messages,
./rconn,
./utils,
../../peerinfo,
../../switch,
../../multiaddress,
../../stream/connection
logScope:
topics = "libp2p relay relay-client"
const RelayClientMsgSize = 4096
type
RelayClientError* = object of LPError
ReservationError* = object of RelayClientError
RelayV1DialError* = object of RelayClientError
RelayV2DialError* = object of RelayClientError
RelayClientAddConn* = proc(conn: Connection,
duration: uint32,
data: uint64): Future[void] {.gcsafe, raises: [Defect].}
RelayClient* = ref object of Relay
onNewConnection*: RelayClientAddConn
canHop: bool
Rsvp* = object
expire*: uint64 # required, Unix expiration time (UTC)
addrs*: seq[MultiAddress] # relay address for reserving peer
voucher*: Option[Voucher] # optional, reservation voucher
limitDuration*: uint32 # seconds
limitData*: uint64 # bytes
proc sendStopError(conn: Connection, code: StatusV2) {.async.} =
trace "send stop status", status = $code & " (" & $ord(code) & ")"
let msg = StopMessage(msgType: StopMessageType.Status, status: some(code))
await conn.writeLp(encode(msg).buffer)
proc handleRelayedConnect(cl: RelayClient, conn: Connection, msg: StopMessage) {.async.} =
if msg.peer.isNone():
await sendStopError(conn, MalformedMessage)
return
let
# TODO: check the go version to see in which way this could fail
# it's unclear in the spec
src = msg.peer.get()
limitDuration = msg.limit.duration
limitData = msg.limit.data
msg = StopMessage(
msgType: StopMessageType.Status,
status: some(Ok))
pb = encode(msg)
trace "incoming relay connection", src
if cl.onNewConnection == nil:
await sendStopError(conn, StatusV2.ConnectionFailed)
await conn.close()
return
await conn.writeLp(pb.buffer)
# This sound redundant but the callback could, in theory, be set to nil during
# conn.writeLp so it's safer to double check
if cl.onNewConnection != nil: await cl.onNewConnection(conn, limitDuration, limitData)
else: await conn.close()
proc reserve*(cl: RelayClient,
peerId: PeerId,
addrs: seq[MultiAddress] = @[]): Future[Rsvp] {.async.} =
let conn = await cl.switch.dial(peerId, addrs, RelayV2HopCodec)
defer: await conn.close()
let
pb = encode(HopMessage(msgType: HopMessageType.Reserve))
msg = try:
await conn.writeLp(pb.buffer)
HopMessage.decode(await conn.readLp(RelayClientMsgSize)).get()
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error writing or reading reservation message", exc=exc.msg
raise newException(ReservationError, exc.msg)
if msg.msgType != HopMessageType.Status:
raise newException(ReservationError, "Unexpected relay response type")
if msg.status.get(UnexpectedMessage) != Ok:
raise newException(ReservationError, "Reservation failed")
if msg.reservation.isNone():
raise newException(ReservationError, "Missing reservation information")
let reservation = msg.reservation.get()
if reservation.expire > int64.high().uint64 or
now().utc > reservation.expire.int64.fromUnix.utc:
raise newException(ReservationError, "Bad expiration date")
result.expire = reservation.expire
result.addrs = reservation.addrs
if reservation.svoucher.isSome():
let svoucher = SignedVoucher.decode(reservation.svoucher.get())
if svoucher.isErr() or svoucher.get().data.relayPeerId != peerId:
raise newException(ReservationError, "Invalid voucher")
result.voucher = some(svoucher.get().data)
result.limitDuration = msg.limit.duration
result.limitData = msg.limit.data
proc dialPeerV1*(
cl: RelayClient,
conn: Connection,
dstPeerId: PeerId,
dstAddrs: seq[MultiAddress]): Future[Connection] {.async.} =
var
msg = RelayMessage(
msgType: some(RelayType.Hop),
srcPeer: some(RelayPeer(peerId: cl.switch.peerInfo.peerId, addrs: cl.switch.peerInfo.addrs)),
dstPeer: some(RelayPeer(peerId: dstPeerId, addrs: dstAddrs)))
pb = encode(msg)
trace "Dial peer", msgSend=msg
try:
await conn.writeLp(pb.buffer)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error writing hop request", exc=exc.msg
raise exc
let msgRcvFromRelayOpt = try:
RelayMessage.decode(await conn.readLp(RelayClientMsgSize))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error reading stop response", exc=exc.msg
await sendStatus(conn, StatusV1.HopCantOpenDstStream)
raise exc
try:
if msgRcvFromRelayOpt.isNone:
raise newException(RelayV1DialError, "Hop can't open destination stream")
let msgRcvFromRelay = msgRcvFromRelayOpt.get()
if msgRcvFromRelay.msgType.isNone or msgRcvFromRelay.msgType.get() != RelayType.Status:
raise newException(RelayV1DialError, "Hop can't open destination stream: wrong message type")
if msgRcvFromRelay.status.isNone or msgRcvFromRelay.status.get() != StatusV1.Success:
raise newException(RelayV1DialError, "Hop can't open destination stream: status failed")
except RelayV1DialError as exc:
await sendStatus(conn, StatusV1.HopCantOpenDstStream)
raise exc
result = conn
proc dialPeerV2*(
cl: RelayClient,
conn: RelayConnection,
dstPeerId: PeerId,
dstAddrs: seq[MultiAddress]): Future[Connection] {.async.} =
let
p = Peer(peerId: dstPeerId, addrs: dstAddrs)
pb = encode(HopMessage(msgType: HopMessageType.Connect, peer: some(p)))
trace "Dial peer", p
let msgRcvFromRelay = try:
await conn.writeLp(pb.buffer)
HopMessage.decode(await conn.readLp(RelayClientMsgSize)).get()
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error reading stop response", exc=exc.msg
raise newException(RelayV2DialError, exc.msg)
if msgRcvFromRelay.msgType != HopMessageType.Status:
raise newException(RelayV2DialError, "Unexpected stop response")
if msgRcvFromRelay.status.get(UnexpectedMessage) != Ok:
trace "Relay stop failed", msg = msgRcvFromRelay.status.get()
raise newException(RelayV2DialError, "Relay stop failure")
conn.limitDuration = msgRcvFromRelay.limit.duration
conn.limitData = msgRcvFromRelay.limit.data
return conn
proc handleStopStreamV2(cl: RelayClient, conn: Connection) {.async, gcsafe.} =
let msgOpt = StopMessage.decode(await conn.readLp(RelayClientMsgSize))
if msgOpt.isNone():
await sendHopStatus(conn, MalformedMessage)
return
trace "client circuit relay v2 handle stream", msg = msgOpt.get()
let msg = msgOpt.get()
if msg.msgType == StopMessageType.Connect:
await cl.handleRelayedConnect(conn, msg)
else:
trace "Unexpected client / relayv2 handshake", msgType=msg.msgType
await sendStopError(conn, MalformedMessage)
proc handleStop(cl: RelayClient, conn: Connection, msg: RelayMessage) {.async, gcsafe.} =
if msg.srcPeer.isNone:
await sendStatus(conn, StatusV1.StopSrcMultiaddrInvalid)
return
let src = msg.srcPeer.get()
if msg.dstPeer.isNone:
await sendStatus(conn, StatusV1.StopDstMultiaddrInvalid)
return
let dst = msg.dstPeer.get()
if dst.peerId != cl.switch.peerInfo.peerId:
await sendStatus(conn, StatusV1.StopDstMultiaddrInvalid)
return
trace "get a relay connection", src, conn
if cl.onNewConnection == nil:
await sendStatus(conn, StatusV1.StopRelayRefused)
await conn.close()
return
await sendStatus(conn, StatusV1.Success)
# This sound redundant but the callback could, in theory, be set to nil during
# sendStatus(Success) so it's safer to double check
if cl.onNewConnection != nil: await cl.onNewConnection(conn, 0, 0)
else: await conn.close()
proc handleStreamV1(cl: RelayClient, conn: Connection) {.async, gcsafe.} =
let msgOpt = RelayMessage.decode(await conn.readLp(RelayClientMsgSize))
if msgOpt.isNone:
await sendStatus(conn, StatusV1.MalformedMessage)
return
trace "client circuit relay v1 handle stream", msg = msgOpt.get()
let msg = msgOpt.get()
case msg.msgType.get:
of RelayType.Hop:
if cl.canHop: await cl.handleHop(conn, msg)
else: await sendStatus(conn, StatusV1.HopCantSpeakRelay)
of RelayType.Stop: await cl.handleStop(conn, msg)
of RelayType.CanHop:
if cl.canHop: await sendStatus(conn, StatusV1.Success)
else: await sendStatus(conn, StatusV1.HopCantSpeakRelay)
else:
trace "Unexpected relay handshake", msgType=msg.msgType
await sendStatus(conn, StatusV1.MalformedMessage)
proc new*(T: typedesc[RelayClient], canHop: bool = false,
reservationTTL: times.Duration = DefaultReservationTTL,
limitDuration: uint32 = DefaultLimitDuration,
limitData: uint64 = DefaultLimitData,
heartbeatSleepTime: uint32 = DefaultHeartbeatSleepTime,
maxCircuit: int = MaxCircuit,
maxCircuitPerPeer: int = MaxCircuitPerPeer,
msgSize: int = RelayClientMsgSize,
circuitRelayV1: bool = false): T =
let cl = T(canHop: canHop,
reservationTTL: reservationTTL,
limit: Limit(duration: limitDuration, data: limitData),
heartbeatSleepTime: heartbeatSleepTime,
maxCircuit: maxCircuit,
maxCircuitPerPeer: maxCircuitPerPeer,
msgSize: msgSize,
isCircuitRelayV1: circuitRelayV1)
proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
try:
case proto:
of RelayV1Codec: await cl.handleStreamV1(conn)
of RelayV2StopCodec: await cl.handleStopStreamV2(conn)
of RelayV2HopCodec: await cl.handleHopStreamV2(conn)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "exception in client handler", exc = exc.msg, conn
finally:
trace "exiting client handler", conn
await conn.close()
cl.handler = handleStream
cl.codecs = if cl.canHop:
@[RelayV1Codec, RelayV2HopCodec, RelayV2StopCodec]
else:
@[RelayV1Codec, RelayV2StopCodec]
cl

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# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import options, macros, sequtils
import stew/objects
import ../../peerinfo,
../../signed_envelope
# Circuit Relay V1 Message
type
RelayType* {.pure.} = enum
Hop = 1
Stop = 2
Status = 3
CanHop = 4
StatusV1* {.pure.} = enum
Success = 100
HopSrcAddrTooLong = 220
HopDstAddrTooLong = 221
HopSrcMultiaddrInvalid = 250
HopDstMultiaddrInvalid = 251
HopNoConnToDst = 260
HopCantDialDst = 261
HopCantOpenDstStream = 262
HopCantSpeakRelay = 270
HopCantRelayToSelf = 280
StopSrcAddrTooLong = 320
StopDstAddrTooLong = 321
StopSrcMultiaddrInvalid = 350
StopDstMultiaddrInvalid = 351
StopRelayRefused = 390
MalformedMessage = 400
RelayPeer* = object
peerId*: PeerId
addrs*: seq[MultiAddress]
RelayMessage* = object
msgType*: Option[RelayType]
srcPeer*: Option[RelayPeer]
dstPeer*: Option[RelayPeer]
status*: Option[StatusV1]
proc encode*(msg: RelayMessage): ProtoBuffer =
result = initProtoBuffer()
if isSome(msg.msgType):
result.write(1, msg.msgType.get().ord.uint)
if isSome(msg.srcPeer):
var peer = initProtoBuffer()
peer.write(1, msg.srcPeer.get().peerId)
for ma in msg.srcPeer.get().addrs:
peer.write(2, ma.data.buffer)
peer.finish()
result.write(2, peer.buffer)
if isSome(msg.dstPeer):
var peer = initProtoBuffer()
peer.write(1, msg.dstPeer.get().peerId)
for ma in msg.dstPeer.get().addrs:
peer.write(2, ma.data.buffer)
peer.finish()
result.write(3, peer.buffer)
if isSome(msg.status):
result.write(4, msg.status.get().ord.uint)
result.finish()
proc decode*(_: typedesc[RelayMessage], buf: seq[byte]): Option[RelayMessage] =
var
rMsg: RelayMessage
msgTypeOrd: uint32
src: RelayPeer
dst: RelayPeer
statusOrd: uint32
pbSrc: ProtoBuffer
pbDst: ProtoBuffer
let
pb = initProtoBuffer(buf)
r1 = pb.getField(1, msgTypeOrd)
r2 = pb.getField(2, pbSrc)
r3 = pb.getField(3, pbDst)
r4 = pb.getField(4, statusOrd)
if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr():
return none(RelayMessage)
if r2.get() and
(pbSrc.getField(1, src.peerId).isErr() or
pbSrc.getRepeatedField(2, src.addrs).isErr()):
return none(RelayMessage)
if r3.get() and
(pbDst.getField(1, dst.peerId).isErr() or
pbDst.getRepeatedField(2, dst.addrs).isErr()):
return none(RelayMessage)
if r1.get():
if msgTypeOrd.int notin RelayType:
return none(RelayMessage)
rMsg.msgType = some(RelayType(msgTypeOrd))
if r2.get(): rMsg.srcPeer = some(src)
if r3.get(): rMsg.dstPeer = some(dst)
if r4.get():
if statusOrd.int notin StatusV1:
return none(RelayMessage)
rMsg.status = some(StatusV1(statusOrd))
some(rMsg)
# Voucher
type
Voucher* = object
relayPeerId*: PeerId # peer ID of the relay
reservingPeerId*: PeerId # peer ID of the reserving peer
expiration*: uint64 # UNIX UTC expiration time for the reservation
proc decode*(_: typedesc[Voucher], buf: seq[byte]): Result[Voucher, ProtoError] =
let pb = initProtoBuffer(buf)
var v = Voucher()
? pb.getRequiredField(1, v.relayPeerId)
? pb.getRequiredField(2, v.reservingPeerId)
? pb.getRequiredField(3, v.expiration)
ok(v)
proc encode*(v: Voucher): seq[byte] =
var pb = initProtoBuffer()
pb.write(1, v.relayPeerId)
pb.write(2, v.reservingPeerId)
pb.write(3, v.expiration)
pb.finish()
pb.buffer
proc init*(T: typedesc[Voucher],
relayPeerId: PeerId,
reservingPeerId: PeerId,
expiration: uint64): T =
T(
relayPeerId = relayPeerId,
reservingPeerId = reservingPeerId,
expiration: expiration
)
type SignedVoucher* = SignedPayload[Voucher]
proc payloadDomain*(_: typedesc[Voucher]): string = "libp2p-relay-rsvp"
proc payloadType*(_: typedesc[Voucher]): seq[byte] = @[ (byte)0x03, (byte)0x02 ]
proc checkValid*(spr: SignedVoucher): Result[void, EnvelopeError] =
if not spr.data.relayPeerId.match(spr.envelope.publicKey):
err(EnvelopeInvalidSignature)
else:
ok()
# Circuit Relay V2 Hop Message
type
Peer* = object
peerId*: PeerId
addrs*: seq[MultiAddress]
Reservation* = object
expire*: uint64 # required, Unix expiration time (UTC)
addrs*: seq[MultiAddress] # relay address for reserving peer
svoucher*: Option[seq[byte]] # optional, reservation voucher
Limit* = object
duration*: uint32 # seconds
data*: uint64 # bytes
StatusV2* = enum
Ok = 100
ReservationRefused = 200
ResourceLimitExceeded = 201
PermissionDenied = 202
ConnectionFailed = 203
NoReservation = 204
MalformedMessage = 400
UnexpectedMessage = 401
HopMessageType* {.pure.} = enum
Reserve = 0
Connect = 1
Status = 2
HopMessage* = object
msgType*: HopMessageType
peer*: Option[Peer]
reservation*: Option[Reservation]
limit*: Limit
status*: Option[StatusV2]
proc encode*(msg: HopMessage): ProtoBuffer =
var pb = initProtoBuffer()
pb.write(1, msg.msgType.ord.uint)
if msg.peer.isSome():
var ppb = initProtoBuffer()
ppb.write(1, msg.peer.get().peerId)
for ma in msg.peer.get().addrs:
ppb.write(2, ma.data.buffer)
ppb.finish()
pb.write(2, ppb.buffer)
if msg.reservation.isSome():
let rsrv = msg.reservation.get()
var rpb = initProtoBuffer()
rpb.write(1, rsrv.expire)
for ma in rsrv.addrs:
rpb.write(2, ma.data.buffer)
if rsrv.svoucher.isSome():
rpb.write(3, rsrv.svoucher.get())
rpb.finish()
pb.write(3, rpb.buffer)
if msg.limit.duration > 0 or msg.limit.data > 0:
var lpb = initProtoBuffer()
if msg.limit.duration > 0: lpb.write(1, msg.limit.duration)
if msg.limit.data > 0: lpb.write(2, msg.limit.data)
lpb.finish()
pb.write(4, lpb.buffer)
if msg.status.isSome():
pb.write(5, msg.status.get().ord.uint)
pb.finish()
pb
proc decode*(_: typedesc[HopMessage], buf: seq[byte]): Option[HopMessage] =
var
msg: HopMessage
msgTypeOrd: uint32
pbPeer: ProtoBuffer
pbReservation: ProtoBuffer
pbLimit: ProtoBuffer
statusOrd: uint32
peer: Peer
reservation: Reservation
limit: Limit
res: bool
let
pb = initProtoBuffer(buf)
r1 = pb.getRequiredField(1, msgTypeOrd)
r2 = pb.getField(2, pbPeer)
r3 = pb.getField(3, pbReservation)
r4 = pb.getField(4, pbLimit)
r5 = pb.getField(5, statusOrd)
if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr() or r5.isErr():
return none(HopMessage)
if r2.get() and
(pbPeer.getRequiredField(1, peer.peerId).isErr() or
pbPeer.getRepeatedField(2, peer.addrs).isErr()):
return none(HopMessage)
if r3.get():
var svoucher: seq[byte]
let rSVoucher = pbReservation.getField(3, svoucher)
if pbReservation.getRequiredField(1, reservation.expire).isErr() or
pbReservation.getRepeatedField(2, reservation.addrs).isErr() or
rSVoucher.isErr():
return none(HopMessage)
if rSVoucher.get(): reservation.svoucher = some(svoucher)
if r4.get() and
(pbLimit.getField(1, limit.duration).isErr() or
pbLimit.getField(2, limit.data).isErr()):
return none(HopMessage)
if not checkedEnumAssign(msg.msgType, msgTypeOrd):
return none(HopMessage)
if r2.get(): msg.peer = some(peer)
if r3.get(): msg.reservation = some(reservation)
if r4.get(): msg.limit = limit
if r5.get():
if statusOrd.int notin StatusV2:
return none(HopMessage)
msg.status = some(StatusV2(statusOrd))
some(msg)
# Circuit Relay V2 Stop Message
type
StopMessageType* {.pure.} = enum
Connect = 0
Status = 1
StopMessage* = object
msgType*: StopMessageType
peer*: Option[Peer]
limit*: Limit
status*: Option[StatusV2]
proc encode*(msg: StopMessage): ProtoBuffer =
var pb = initProtoBuffer()
pb.write(1, msg.msgType.ord.uint)
if msg.peer.isSome():
var ppb = initProtoBuffer()
ppb.write(1, msg.peer.get().peerId)
for ma in msg.peer.get().addrs:
ppb.write(2, ma.data.buffer)
ppb.finish()
pb.write(2, ppb.buffer)
if msg.limit.duration > 0 or msg.limit.data > 0:
var lpb = initProtoBuffer()
if msg.limit.duration > 0: lpb.write(1, msg.limit.duration)
if msg.limit.data > 0: lpb.write(2, msg.limit.data)
lpb.finish()
pb.write(3, lpb.buffer)
if msg.status.isSome():
pb.write(4, msg.status.get().ord.uint)
pb.finish()
pb
proc decode*(_: typedesc[StopMessage], buf: seq[byte]): Option[StopMessage] =
var
msg: StopMessage
msgTypeOrd: uint32
pbPeer: ProtoBuffer
pbLimit: ProtoBuffer
statusOrd: uint32
peer: Peer
limit: Limit
rVoucher: ProtoResult[bool]
res: bool
let
pb = initProtoBuffer(buf)
r1 = pb.getRequiredField(1, msgTypeOrd)
r2 = pb.getField(2, pbPeer)
r3 = pb.getField(3, pbLimit)
r4 = pb.getField(4, statusOrd)
if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr():
return none(StopMessage)
if r2.get() and
(pbPeer.getRequiredField(1, peer.peerId).isErr() or
pbPeer.getRepeatedField(2, peer.addrs).isErr()):
return none(StopMessage)
if r3.get() and
(pbLimit.getField(1, limit.duration).isErr() or
pbLimit.getField(2, limit.data).isErr()):
return none(StopMessage)
if msgTypeOrd.int notin StopMessageType.low.ord .. StopMessageType.high.ord:
return none(StopMessage)
msg.msgType = StopMessageType(msgTypeOrd)
if r2.get(): msg.peer = some(peer)
if r3.get(): msg.limit = limit
if r4.get():
if statusOrd.int notin StatusV2:
return none(StopMessage)
msg.status = some(StatusV2(statusOrd))
some(msg)

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# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import chronos
import ../../stream/connection
type
RelayConnection* = ref object of Connection
conn*: Connection
limitDuration*: uint32
limitData*: uint64
dataSent*: uint64
method readOnce*(
self: RelayConnection,
pbytes: pointer,
nbytes: int): Future[int] {.async.} =
self.activity = true
return await self.conn.readOnce(pbytes, nbytes)
method write*(self: RelayConnection, msg: seq[byte]): Future[void] {.async.} =
self.dataSent.inc(msg.len)
if self.limitData != 0 and self.dataSent > self.limitData:
await self.close()
return
self.activity = true
await self.conn.write(msg)
method closeImpl*(self: RelayConnection): Future[void] {.async.} =
await self.conn.close()
await procCall Connection(self).closeImpl()
method getWrapped*(self: RelayConnection): Connection = self.conn
proc new*(
T: typedesc[RelayConnection],
conn: Connection,
limitDuration: uint32,
limitData: uint64): T =
let rc = T(conn: conn, limitDuration: limitDuration, limitData: limitData)
rc.initStream()
if limitDuration > 0:
proc checkDurationConnection() {.async.} =
let sleep = sleepAsync(limitDuration.seconds())
await sleep or conn.join()
if sleep.finished: await conn.close()
else: sleep.cancel()
asyncSpawn checkDurationConnection()
return rc

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# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import options, sequtils, tables, sugar
import chronos, chronicles
import ./messages,
./rconn,
./utils,
../../peerinfo,
../../switch,
../../multiaddress,
../../multicodec,
../../stream/connection,
../../protocols/protocol,
../../transports/transport,
../../errors,
../../utils/heartbeat,
../../signed_envelope
# TODO:
# * Eventually replace std/times by chronos/timer. Currently chronos/timer
# doesn't offer the possibility to get a datetime in UNIX UTC
# * Eventually add an access control list in the handleReserve, handleConnect
# and handleHop
# * Better reservation management ie find a way to re-reserve when the end is nigh
import std/times
export chronicles
const
RelayMsgSize* = 4096
DefaultReservationTTL* = initDuration(hours = 1)
DefaultLimitDuration* = 120
DefaultLimitData* = 1 shl 17
DefaultHeartbeatSleepTime* = 1
MaxCircuit* = 128
MaxCircuitPerPeer* = 16
logScope:
topics = "libp2p relay"
type
RelayV2Error* = object of LPError
SendStopError = object of RelayV2Error
# Relay Side
type
Relay* = ref object of LPProtocol
switch*: Switch
peerCount: CountTable[PeerId]
# number of reservation (relayv2) + number of connection (relayv1)
maxCircuit*: int
maxCircuitPerPeer*: int
msgSize*: int
# RelayV1
isCircuitRelayV1*: bool
streamCount: int
# RelayV2
rsvp: Table[PeerId, DateTime]
reservationLoop: Future[void]
reservationTTL*: times.Duration
heartbeatSleepTime*: uint32
limit*: Limit
# Relay V2
proc createReserveResponse(
r: Relay,
pid: PeerId,
expire: DateTime): Result[HopMessage, CryptoError] =
let
expireUnix = expire.toTime.toUnix.uint64
v = Voucher(relayPeerId: r.switch.peerInfo.peerId,
reservingPeerId: pid,
expiration: expireUnix)
sv = ? SignedVoucher.init(r.switch.peerInfo.privateKey, v)
ma = ? MultiAddress.init("/p2p/" & $r.switch.peerInfo.peerId).orErr(CryptoError.KeyError)
rsrv = Reservation(expire: expireUnix,
addrs: r.switch.peerInfo.addrs.mapIt(
? it.concat(ma).orErr(CryptoError.KeyError)),
svoucher: some(? sv.encode))
msg = HopMessage(msgType: HopMessageType.Status,
reservation: some(rsrv),
limit: r.limit,
status: some(Ok))
return ok(msg)
proc isRelayed(conn: Connection): bool =
var wrappedConn = conn
while not isNil(wrappedConn):
if wrappedConn of RelayConnection:
return true
wrappedConn = wrappedConn.getWrapped()
return false
proc handleReserve(r: Relay, conn: Connection) {.async, gcsafe.} =
if conn.isRelayed():
trace "reservation attempt over relay connection", pid = conn.peerId
await sendHopStatus(conn, PermissionDenied)
return
if r.peerCount[conn.peerId] + r.rsvp.len() >= r.maxCircuit:
trace "Too many reservations", pid = conn.peerId
await sendHopStatus(conn, ReservationRefused)
return
let
pid = conn.peerId
expire = now().utc + r.reservationTTL
msg = r.createReserveResponse(pid, expire)
trace "reserving relay slot for", pid
if msg.isErr():
trace "error signing the voucher", error = error(msg), pid
return
r.rsvp[pid] = expire
await conn.writeLp(encode(msg.get()).buffer)
proc handleConnect(r: Relay,
connSrc: Connection,
msg: HopMessage) {.async, gcsafe.} =
if connSrc.isRelayed():
trace "connection attempt over relay connection"
await sendHopStatus(connSrc, PermissionDenied)
return
if msg.peer.isNone():
await sendHopStatus(connSrc, MalformedMessage)
return
let
src = connSrc.peerId
dst = msg.peer.get().peerId
if dst notin r.rsvp:
trace "refusing connection, no reservation", src, dst
await sendHopStatus(connSrc, NoReservation)
return
r.peerCount.inc(src)
r.peerCount.inc(dst)
defer:
r.peerCount.inc(src, -1)
r.peerCount.inc(dst, -1)
if r.peerCount[src] > r.maxCircuitPerPeer or
r.peerCount[dst] > r.maxCircuitPerPeer:
trace "too many connections", src = r.peerCount[src],
dst = r.peerCount[dst],
max = r.maxCircuitPerPeer
await sendHopStatus(connSrc, ResourceLimitExceeded)
return
let connDst = try:
await r.switch.dial(dst, RelayV2StopCodec)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error opening relay stream", dst, exc=exc.msg
await sendHopStatus(connSrc, ConnectionFailed)
return
defer:
await connDst.close()
proc sendStopMsg() {.async.} =
let stopMsg = StopMessage(msgType: StopMessageType.Connect,
peer: some(Peer(peerId: src, addrs: @[])),
limit: r.limit)
await connDst.writeLp(encode(stopMsg).buffer)
let msg = StopMessage.decode(await connDst.readLp(r.msgSize)).get()
if msg.msgType != StopMessageType.Status:
raise newException(SendStopError, "Unexpected stop response, not a status message")
if msg.status.get(UnexpectedMessage) != Ok:
raise newException(SendStopError, "Relay stop failure")
await connSrc.writeLp(encode(HopMessage(msgType: HopMessageType.Status,
status: some(Ok))).buffer)
try:
await sendStopMsg()
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error sending stop message", msg = exc.msg
await sendHopStatus(connSrc, ConnectionFailed)
return
trace "relaying connection", src, dst
let
rconnSrc = RelayConnection.new(connSrc, r.limit.duration, r.limit.data)
rconnDst = RelayConnection.new(connDst, r.limit.duration, r.limit.data)
defer:
await rconnSrc.close()
await rconnDst.close()
await bridge(rconnSrc, rconnDst)
proc handleHopStreamV2*(r: Relay, conn: Connection) {.async, gcsafe.} =
let msgOpt = HopMessage.decode(await conn.readLp(r.msgSize))
if msgOpt.isNone():
await sendHopStatus(conn, MalformedMessage)
return
trace "relayv2 handle stream", msg = msgOpt.get()
let msg = msgOpt.get()
case msg.msgType:
of HopMessageType.Reserve: await r.handleReserve(conn)
of HopMessageType.Connect: await r.handleConnect(conn, msg)
else:
trace "Unexpected relayv2 handshake", msgType=msg.msgType
await sendHopStatus(conn, MalformedMessage)
# Relay V1
proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsafe.} =
r.streamCount.inc()
defer: r.streamCount.dec()
if r.streamCount + r.rsvp.len() >= r.maxCircuit:
trace "refusing connection; too many active circuit", streamCount = r.streamCount, rsvp = r.rsvp.len()
await sendStatus(connSrc, StatusV1.HopCantSpeakRelay)
return
proc checkMsg(): Result[RelayMessage, StatusV1] =
if msg.srcPeer.isNone:
return err(StatusV1.HopSrcMultiaddrInvalid)
let src = msg.srcPeer.get()
if src.peerId != connSrc.peerId:
return err(StatusV1.HopSrcMultiaddrInvalid)
if msg.dstPeer.isNone:
return err(StatusV1.HopDstMultiaddrInvalid)
let dst = msg.dstPeer.get()
if dst.peerId == r.switch.peerInfo.peerId:
return err(StatusV1.HopCantRelayToSelf)
if not r.switch.isConnected(dst.peerId):
trace "relay not connected to dst", dst
return err(StatusV1.HopNoConnToDst)
ok(msg)
let check = checkMsg()
if check.isErr:
await sendStatus(connSrc, check.error())
return
let
src = msg.srcPeer.get()
dst = msg.dstPeer.get()
if r.peerCount[src.peerId] >= r.maxCircuitPerPeer or
r.peerCount[dst.peerId] >= r.maxCircuitPerPeer:
trace "refusing connection; too many connection from src or to dst", src, dst
await sendStatus(connSrc, StatusV1.HopCantSpeakRelay)
return
r.peerCount.inc(src.peerId)
r.peerCount.inc(dst.peerId)
defer:
r.peerCount.inc(src.peerId, -1)
r.peerCount.inc(dst.peerId, -1)
let connDst = try:
await r.switch.dial(dst.peerId, RelayV1Codec)
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error opening relay stream", dst, exc=exc.msg
await sendStatus(connSrc, StatusV1.HopCantDialDst)
return
defer:
await connDst.close()
let msgToSend = RelayMessage(
msgType: some(RelayType.Stop),
srcPeer: some(src),
dstPeer: some(dst))
let msgRcvFromDstOpt = try:
await connDst.writeLp(encode(msgToSend).buffer)
RelayMessage.decode(await connDst.readLp(r.msgSize))
except CancelledError as exc:
raise exc
except CatchableError as exc:
trace "error writing stop handshake or reading stop response", exc=exc.msg
await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
return
if msgRcvFromDstOpt.isNone:
trace "error reading stop response", msg = msgRcvFromDstOpt
await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
return
let msgRcvFromDst = msgRcvFromDstOpt.get()
if msgRcvFromDst.msgType.get(RelayType.Stop) != RelayType.Status or
msgRcvFromDst.status.get(StatusV1.StopRelayRefused) != StatusV1.Success:
trace "unexcepted relay stop response", msgRcvFromDst
await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
return
await sendStatus(connSrc, StatusV1.Success)
trace "relaying connection", src, dst
await bridge(connSrc, connDst)
proc handleStreamV1(r: Relay, conn: Connection) {.async, gcsafe.} =
let msgOpt = RelayMessage.decode(await conn.readLp(r.msgSize))
if msgOpt.isNone:
await sendStatus(conn, StatusV1.MalformedMessage)
return
trace "relay handle stream", msg = msgOpt.get()
let msg = msgOpt.get()
case msg.msgType.get:
of RelayType.Hop: await r.handleHop(conn, msg)
of RelayType.Stop: await sendStatus(conn, StatusV1.StopRelayRefused)
of RelayType.CanHop: await sendStatus(conn, StatusV1.Success)
else:
trace "Unexpected relay handshake", msgType=msg.msgType
await sendStatus(conn, StatusV1.MalformedMessage)
proc setup*(r: Relay, switch: Switch) =
r.switch = switch
r.switch.addPeerEventHandler(
proc (peerId: PeerId, event: PeerEvent) {.async.} =
r.rsvp.del(peerId),
Left)
proc new*(T: typedesc[Relay],
reservationTTL: times.Duration = DefaultReservationTTL,
limitDuration: uint32 = DefaultLimitDuration,
limitData: uint64 = DefaultLimitData,
heartbeatSleepTime: uint32 = DefaultHeartbeatSleepTime,
maxCircuit: int = MaxCircuit,
maxCircuitPerPeer: int = MaxCircuitPerPeer,
msgSize: int = RelayMsgSize,
circuitRelayV1: bool = false): T =
let r = T(reservationTTL: reservationTTL,
limit: Limit(duration: limitDuration, data: limitData),
heartbeatSleepTime: heartbeatSleepTime,
maxCircuit: maxCircuit,
maxCircuitPerPeer: maxCircuitPerPeer,
msgSize: msgSize,
isCircuitRelayV1: circuitRelayV1)
proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
try:
case proto:
of RelayV2HopCodec: await r.handleHopStreamV2(conn)
of RelayV1Codec: await r.handleStreamV1(conn)
except CancelledError as exc:
raise exc
except CatchableError as exc:
debug "exception in relayv2 handler", exc = exc.msg, conn
finally:
trace "exiting relayv2 handler", conn
await conn.close()
r.codecs = if r.isCircuitRelayV1: @[RelayV1Codec]
else: @[RelayV2HopCodec, RelayV1Codec]
r.handler = handleStream
r
proc deletesReservation(r: Relay) {.async.} =
heartbeat "Reservation timeout", r.heartbeatSleepTime.seconds():
let n = now().utc
for k in toSeq(r.rsvp.keys):
if n > r.rsvp[k]:
r.rsvp.del(k)
method start*(r: Relay) {.async.} =
if not r.reservationLoop.isNil:
warn "Starting relay twice"
return
r.reservationLoop = r.deletesReservation()
r.started = true
method stop*(r: Relay) {.async.} =
if r.reservationLoop.isNil:
warn "Stopping relay without starting it"
return
r.started = false
r.reservationLoop.cancel()
r.reservationLoop = nil

106
libp2p/protocols/relay/rtransport.nim Normal file
View File

@ -0,0 +1,106 @@
# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import sequtils, strutils
import chronos, chronicles
import ./client,
./rconn,
./utils,
../../switch,
../../stream/connection,
../../transports/transport
logScope:
topics = "libp2p relay relay-transport"
type
RelayTransport* = ref object of Transport
client*: RelayClient
queue: AsyncQueue[Connection]
selfRunning: bool
method start*(self: RelayTransport, ma: seq[MultiAddress]) {.async.} =
if self.selfRunning:
trace "Relay transport already running"
return
self.client.onNewConnection = proc(
conn: Connection,
duration: uint32 = 0,
data: uint64 = 0) {.async, gcsafe, raises: [Defect].} =
await self.queue.addLast(RelayConnection.new(conn, duration, data))
await conn.join()
self.selfRunning = true
await procCall Transport(self).start(ma)
trace "Starting Relay transport"
method stop*(self: RelayTransport) {.async, gcsafe.} =
self.running = false
self.selfRunning = false
self.client.onNewConnection = nil
while not self.queue.empty():
await self.queue.popFirstNoWait().close()
method accept*(self: RelayTransport): Future[Connection] {.async, gcsafe.} =
result = await self.queue.popFirst()
proc dial*(self: RelayTransport, ma: MultiAddress): Future[Connection] {.async, gcsafe.} =
let
sma = toSeq(ma.items())
relayAddrs = sma[0..sma.len-4].mapIt(it.tryGet()).foldl(a & b)
var
relayPeerId: PeerId
dstPeerId: PeerId
if not relayPeerId.init(($(sma[^3].get())).split('/')[2]):
raise newException(RelayV2DialError, "Relay doesn't exist")
if not dstPeerId.init(($(sma[^1].get())).split('/')[2]):
raise newException(RelayV2DialError, "Destination doesn't exist")
trace "Dial", relayPeerId, dstPeerId
let conn = await self.client.switch.dial(
relayPeerId,
@[ relayAddrs ],
@[ RelayV2HopCodec, RelayV1Codec ])
conn.dir = Direction.Out
var rc: RelayConnection
try:
case conn.protocol:
of RelayV1Codec:
return await self.client.dialPeerV1(conn, dstPeerId, @[])
of RelayV2HopCodec:
rc = RelayConnection.new(conn, 0, 0)
return await self.client.dialPeerV2(rc, dstPeerId, @[])
except CancelledError as exc:
raise exc
except CatchableError as exc:
if not rc.isNil: await rc.close()
raise exc
method dial*(
self: RelayTransport,
hostname: string,
address: MultiAddress): Future[Connection] {.async, gcsafe.} =
result = await self.dial(address)
method handles*(self: RelayTransport, ma: MultiAddress): bool {.gcsafe} =
if ma.protocols.isOk():
let sma = toSeq(ma.items())
if sma.len >= 3:
result = CircuitRelay.match(sma[^2].get()) and
P2PPattern.match(sma[^1].get())
trace "Handles return", ma, result
proc new*(T: typedesc[RelayTransport], cl: RelayClient, upgrader: Upgrade): T =
result = T(client: cl, upgrader: upgrader)
result.running = true
result.queue = newAsyncQueue[Connection](0)

84
libp2p/protocols/relay/utils.nim Normal file
View File

@ -0,0 +1,84 @@
# Nim-LibP2P
# Copyright (c) 2022 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.
{.push raises: [Defect].}
import options
import chronos, chronicles
import ./messages,
../../stream/connection
logScope:
topics = "libp2p relay relay-utils"
const
RelayV1Codec* = "/libp2p/circuit/relay/0.1.0"
RelayV2HopCodec* = "/libp2p/circuit/relay/0.2.0/hop"
RelayV2StopCodec* = "/libp2p/circuit/relay/0.2.0/stop"
proc sendStatus*(conn: Connection, code: StatusV1) {.async, gcsafe.} =
trace "send relay/v1 status", status = $code & "(" & $ord(code) & ")"
let
msg = RelayMessage(msgType: some(RelayType.Status), status: some(code))
pb = encode(msg)
await conn.writeLp(pb.buffer)
proc sendHopStatus*(conn: Connection, code: StatusV2) {.async, gcsafe.} =
trace "send hop relay/v2 status", status = $code & "(" & $ord(code) & ")"
let
msg = HopMessage(msgType: HopMessageType.Status, status: some(code))
pb = encode(msg)
await conn.writeLp(pb.buffer)
proc sendStopStatus*(conn: Connection, code: StatusV2) {.async.} =
trace "send stop relay/v2 status", status = $code & " (" & $ord(code) & ")"
let
msg = StopMessage(msgType: StopMessageType.Status, status: some(code))
pb = encode(msg)
await conn.writeLp(pb.buffer)
proc bridge*(connSrc: Connection, connDst: Connection) {.async.} =
const bufferSize = 4096
var
bufSrcToDst: array[bufferSize, byte]
bufDstToSrc: array[bufferSize, byte]
futSrc = connSrc.readOnce(addr bufSrcToDst[0], bufSrcToDst.high + 1)
futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.high + 1)
bytesSendFromSrcToDst = 0
bytesSendFromDstToSrc = 0
bufRead: int
try:
while not connSrc.closed() and not connDst.closed():
await futSrc or futDst
if futSrc.finished():
bufRead = await futSrc
bytesSendFromSrcToDst.inc(bufRead)
await connDst.write(@bufSrcToDst[0..<bufRead])
zeroMem(addr(bufSrcToDst), bufSrcToDst.high + 1)
futSrc = connSrc.readOnce(addr bufSrcToDst[0], bufSrcToDst.high + 1)
if futDst.finished():
bufRead = await futDst
bytesSendFromDstToSrc += bufRead
await connSrc.write(bufDstToSrc[0..<bufRead])
zeroMem(addr(bufDstToSrc), bufDstToSrc.high + 1)
futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.high + 1)
except CancelledError as exc:
raise exc
except CatchableError as exc:
if connSrc.closed() or connSrc.atEof():
trace "relay src closed connection", src = connSrc.peerId
if connDst.closed() or connDst.atEof():
trace "relay dst closed connection", dst = connDst.peerId
trace "relay error", exc=exc.msg
trace "end relaying", bytesSendFromSrcToDst, bytesSendFromDstToSrc
await futSrc.cancelAndWait()
await futDst.cancelAndWait()

2
libp2p/protocols/secure/secure.nim
View File

@ -72,6 +72,8 @@ method closeImpl*(s: SecureConn) {.async.} =
method readMessage*(c: SecureConn): Future[seq[byte]] {.async, base.} =
doAssert(false, "Not implemented!")
method getWrapped*(s: SecureConn): Connection = s.stream
method handshake*(s: Secure,
conn: Connection,
initiator: bool): Future[SecureConn] {.async, base.} =

8
libp2p/signed_envelope.nim
View File

@ -119,6 +119,14 @@ proc getField*(pb: ProtoBuffer, field: int,
else:
err(ProtoError.IncorrectBlob)
proc write*(pb: var ProtoBuffer, field: int, env: Envelope): Result[void, CryptoError] =
let e = env.encode()
if e.isErr():
return err(e.error)
pb.write(field, e.get())
ok()
type
SignedPayload*[T] = object
# T needs to have .encode(), .decode(), .payloadType(), .domain()

2
libp2p/stream/chronosstream.nim
View File

@ -156,3 +156,5 @@ method closeImpl*(s: ChronosStream) {.async.} =
s.untrackPeerIdentity()
await procCall Connection(s).closeImpl()
method getWrapped*(s: ChronosStream): Connection = nil

5
libp2p/stream/connection.nim
View File

@ -36,7 +36,7 @@ type
peerId*: PeerId
observedAddr*: MultiAddress
upgraded*: Future[void]
tag*: string # debug tag for metrics (generally ms protocol)
protocol*: string # protocol used by the connection, used as tag for metrics
transportDir*: Direction # The bottom level transport (generally the socket) direction
when defined(libp2p_agents_metrics):
shortAgent*: string
@ -151,6 +151,9 @@ proc timeoutMonitor(s: Connection) {.async, gcsafe.} =
if not await s.pollActivity():
return
method getWrapped*(s: Connection): Connection {.base.} =
doAssert(false, "not implemented!")
proc new*(C: type Connection,
peerId: PeerId,
dir: Direction,

3
libp2p/switch.nim
View File

@ -101,8 +101,7 @@ proc removePeerEventHandler*(s: Switch,
kind: PeerEventKind) {.public.} =
s.connManager.removePeerEventHandler(handler, kind)
method addTransport*(s: Switch,
t: Transport) =
method addTransport*(s: Switch, t: Transport) =
s.transports &= t
s.dialer.addTransport(t)

9
libp2p/transports/tcptransport.nim
View File

@ -127,7 +127,6 @@ proc new*(
flags: flags,
upgrader: upgrade)
inc getTcpTransportTracker().opened
return transport
method start*(
@ -142,6 +141,7 @@ method start*(
await procCall Transport(self).start(addrs)
trace "Starting TCP transport"
inc getTcpTransportTracker().opened
for i, ma in addrs:
if not self.handles(ma):
@ -165,16 +165,19 @@ method start*(
method stop*(self: TcpTransport) {.async, gcsafe.} =
## stop the transport
##
try:
trace "Stopping TCP transport"
await procCall Transport(self).stop() # call base
checkFutures(
await allFinished(
self.clients[Direction.In].mapIt(it.closeWait()) &
self.clients[Direction.Out].mapIt(it.closeWait())))
if not self.running:
warn "TCP transport already stopped"
return
await procCall Transport(self).stop() # call base
var toWait: seq[Future[void]]
for fut in self.acceptFuts:
if not fut.finished:

2
libp2p/transports/wstransport.nim
View File

@ -87,6 +87,8 @@ method closeImpl*(s: WsStream): Future[void] {.async.} =
await s.session.close()
await procCall Connection(s).closeImpl()
method getWrapped*(s: WsStream): Connection = nil
type
WsTransport* = ref object of Transport
httpservers: seq[HttpServer]

23
tests/commoninterop.nim
View File

@ -2,13 +2,14 @@ import options, tables
import chronos, chronicles, stew/byteutils
import helpers
import ../libp2p
import ../libp2p/[daemon/daemonapi, varint, transports/wstransport, crypto/crypto, protocols/relay ]
import ../libp2p/[daemon/daemonapi, varint, transports/wstransport, crypto/crypto]
import ../libp2p/protocols/relay/[relay, client, utils]
type
SwitchCreator = proc(
isRelay: bool = false,
ma: MultiAddress = MultiAddress.init("/ip4/127.0.0.1/tcp/0").tryGet(),
prov: TransportProvider = proc(upgr: Upgrade): Transport = TcpTransport.new({}, upgr)):
prov: TransportProvider = proc(upgr: Upgrade): Transport = TcpTransport.new({}, upgr),
relay: Relay = Relay.new(circuitRelayV1 = true)):
Switch {.gcsafe, raises: [Defect, LPError].}
DaemonPeerInfo = daemonapi.PeerInfo
@ -491,8 +492,8 @@ proc relayInteropTests*(name: string, relayCreator: SwitchCreator) =
let
maSrc = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
maRel = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
src = relayCreator(false, maSrc)
rel = relayCreator(true, maRel)
src = relayCreator(maSrc, relay = RelayClient.new(circuitRelayV1 = true))
rel = relayCreator(maRel)
await src.start()
await rel.start()
@ -525,7 +526,7 @@ proc relayInteropTests*(name: string, relayCreator: SwitchCreator) =
await conn.writeLp("line4")
await conn.close()
let
protos = @[ "/customProto", RelayCodec ]
protos = @[ "/customProto", RelayV1Codec ]
var
customProto = new LPProtocol
customProto.handler = customHandler
@ -533,8 +534,8 @@ proc relayInteropTests*(name: string, relayCreator: SwitchCreator) =
let
maRel = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
maDst = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
rel = relayCreator(true, maRel)
dst = relayCreator(false, maDst)
rel = relayCreator(maRel)
dst = relayCreator(maDst, relay=RelayClient.new())
dst.mount(customProto)
await rel.start()
@ -564,7 +565,7 @@ proc relayInteropTests*(name: string, relayCreator: SwitchCreator) =
await conn.writeLp("line4")
await conn.close()
let
protos = @[ "/customProto", RelayCodec ]
protos = @[ "/customProto", RelayV1Codec ]
var
customProto = new LPProtocol
customProto.handler = customHandler
@ -572,8 +573,8 @@ proc relayInteropTests*(name: string, relayCreator: SwitchCreator) =
let
maSrc = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
maDst = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
src = relayCreator(false, maSrc)
dst = relayCreator(false, maDst)
src = relayCreator(maSrc, relay=RelayClient.new())
dst = relayCreator(maDst, relay=RelayClient.new())
dst.mount(customProto)
await src.start()

14
tests/testinterop.nim
View File

@ -1,11 +1,11 @@
import helpers, commoninterop
import ../libp2p
import ../libp2p/crypto/crypto
import ../libp2p/crypto/crypto, ../libp2p/protocols/relay/[relay, client]
proc switchMplexCreator(
isRelay: bool = false,
ma: MultiAddress = MultiAddress.init("/ip4/127.0.0.1/tcp/0").tryGet(),
prov: TransportProvider = proc(upgr: Upgrade): Transport = TcpTransport.new({}, upgr)):
prov: TransportProvider = proc(upgr: Upgrade): Transport = TcpTransport.new({}, upgr),
relay: Relay = Relay.new(circuitRelayV1 = true)):
Switch {.raises: [Defect, LPError].} =
SwitchBuilder.new()
@ -20,14 +20,14 @@ proc switchMplexCreator(
.withMaxConnsPerPeer(MaxConnectionsPerPeer)
.withPeerStore(capacity=1000)
.withNoise()
.withRelayTransport(isRelay)
.withCircuitRelay(relay)
.withNameResolver(nil)
.build()
proc switchYamuxCreator(
isRelay: bool = false,
ma: MultiAddress = MultiAddress.init("/ip4/127.0.0.1/tcp/0").tryGet(),
prov: TransportProvider = proc(upgr: Upgrade): Transport = TcpTransport.new({}, upgr)):
prov: TransportProvider = proc(upgr: Upgrade): Transport = TcpTransport.new({}, upgr),
relay: Relay = Relay.new(circuitRelayV1 = true)):
Switch {.raises: [Defect, LPError].} =
SwitchBuilder.new()
@ -42,7 +42,7 @@ proc switchYamuxCreator(
.withMaxConnsPerPeer(MaxConnectionsPerPeer)
.withPeerStore(capacity=1000)
.withNoise()
.withRelayTransport(isRelay)
.withCircuitRelay(relay)
.withNameResolver(nil)
.build()

3
tests/testnative.nim
View File

@ -35,4 +35,5 @@ import testtcptransport,
testpeerstore,
testping,
testmplex,
testrelay
testrelayv1,
testrelayv2

350
tests/testrelay.nim
View File

@ -1,350 +0,0 @@
{.used.}
import options, chronos
import stew/byteutils
import ../libp2p/[protocols/relay,
multiaddress,
peerinfo,
peerid,
stream/connection,
multistream,
transports/transport,
switch,
builders,
upgrademngrs/upgrade,
varint,
daemon/daemonapi]
import ./helpers
proc new(T: typedesc[RelayTransport], relay: Relay): T =
T.new(relay = relay, upgrader = relay.switch.transports[0].upgrader)
proc writeLp*(s: StreamTransport, msg: string | seq[byte]): Future[int] {.gcsafe.} =
## write lenght prefixed
var buf = initVBuffer()
buf.writeSeq(msg)
buf.finish()
result = s.write(buf.buffer)
proc readLp*(s: StreamTransport): Future[seq[byte]] {.async, gcsafe.} =
## read length prefixed msg
var
size: uint
length: int
res: VarintResult[void]
result = newSeq[byte](10)
for i in 0..<len(result):
await s.readExactly(addr result[i], 1)
res = LP.getUVarint(result.toOpenArray(0, i), length, size)
if res.isOk():
break
res.expect("Valid varint")
result.setLen(size)
if size > 0.uint:
await s.readExactly(addr result[0], int(size))
suite "Circuit Relay":
asyncTeardown:
await allFutures(src.stop(), dst.stop(), rel.stop())
checkTrackers()
var
protos {.threadvar.}: seq[string]
customProto {.threadvar.}: LPProtocol
ma {.threadvar.}: MultiAddress
src {.threadvar.}: Switch
dst {.threadvar.}: Switch
rel {.threadvar.}: Switch
relaySrc {.threadvar.}: Relay
relayDst {.threadvar.}: Relay
relayRel {.threadvar.}: Relay
conn {.threadvar.}: Connection
msg {.threadvar.}: ProtoBuffer
rcv {.threadvar.}: Option[RelayMessage]
proc createMsg(
msgType: Option[RelayType] = RelayType.none,
status: Option[RelayStatus] = RelayStatus.none,
src: Option[RelayPeer] = RelayPeer.none,
dst: Option[RelayPeer] = RelayPeer.none): ProtoBuffer =
encodeMsg(RelayMessage(msgType: msgType, srcPeer: src, dstPeer: dst, status: status))
proc checkMsg(msg: Option[RelayMessage],
msgType: Option[RelayType] = none[RelayType](),
status: Option[RelayStatus] = none[RelayStatus](),
src: Option[RelayPeer] = none[RelayPeer](),
dst: Option[RelayPeer] = none[RelayPeer]()): bool =
msg.isSome and msg.get == RelayMessage(msgType: msgType, srcPeer: src, dstPeer: dst, status: status)
proc customHandler(conn: Connection, proto: string) {.async.} =
check "line1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("line2")
check "line3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("line4")
await conn.close()
asyncSetup:
# Create a custom prototype
protos = @[ "/customProto", RelayCodec ]
customProto = new LPProtocol
customProto.handler = customHandler
customProto.codec = protos[0]
ma = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
src = newStandardSwitch()
rel = newStandardSwitch()
dst = SwitchBuilder
.new()
.withRng(newRng())
.withAddresses(@[ ma ])
.withTcpTransport()
.withMplex()
.withNoise()
.build()
relaySrc = Relay.new(src, false)
relayDst = Relay.new(dst, false)
relayRel = Relay.new(rel, true)
src.mount(relaySrc)
dst.mount(relayDst)
dst.mount(customProto)
rel.mount(relayRel)
src.addTransport(RelayTransport.new(relaySrc))
dst.addTransport(RelayTransport.new(relayDst))
await src.start()
await dst.start()
await rel.start()
asyncTest "Handle CanHop":
msg = createMsg(some(CanHop))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(RelayStatus.Success))
conn = await src.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayCodec)
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantSpeakRelay))
await conn.close()
asyncTest "Malformed":
conn = await rel.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Status))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
await conn.close()
check rcv.checkMsg(some(Status), some(MalformedMessage))
asyncTest "Handle Stop Error":
conn = await rel.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Stop),
none(RelayStatus),
none(RelayPeer),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(StopSrcMultiaddrInvalid))
conn = await rel.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Stop),
none(RelayStatus),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
none(RelayPeer))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(StopDstMultiaddrInvalid))
conn = await rel.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Stop),
none(RelayStatus),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
await conn.close()
check rcv.checkMsg(some(Status), some(StopDstMultiaddrInvalid))
asyncTest "Handle Hop Error":
conn = await src.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantSpeakRelay))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
none(RelayPeer),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopSrcMultiaddrInvalid))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopSrcMultiaddrInvalid))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
none(RelayPeer))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopDstMultiaddrInvalid))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: rel.peerInfo.peerId, addrs: rel.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantRelayToSelf))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: rel.peerInfo.peerId, addrs: rel.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantRelayToSelf))
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopNoConnToDst))
await rel.connect(dst.peerInfo.peerId, dst.peerInfo.addrs)
relayRel.maxCircuit = 0
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantSpeakRelay))
relayRel.maxCircuit = relay.MaxCircuit
await conn.close()
relayRel.maxCircuitPerPeer = 0
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantSpeakRelay))
relayRel.maxCircuitPerPeer = relay.MaxCircuitPerPeer
await conn.close()
let dst2 = newStandardSwitch()
await dst2.start()
await rel.connect(dst2.peerInfo.peerId, dst2.peerInfo.addrs)
conn = await src.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayCodec)
msg = createMsg(some(RelayType.Hop),
none(RelayStatus),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: dst2.peerInfo.peerId, addrs: dst2.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = relay.decodeMsg(await conn.readLp(relay.MsgSize))
check rcv.checkMsg(some(Status), some(HopCantDialDst))
await allFutures(dst2.stop())
asyncTest "Dial Peer":
let maStr = $rel.peerInfo.addrs[0] & "/p2p/" & $rel.peerInfo.peerId & "/p2p-circuit/p2p/" & $dst.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await rel.connect(dst.peerInfo.peerId, dst.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
await conn.writeLp("line1")
check string.fromBytes(await conn.readLp(1024)) == "line2"
await conn.writeLp("line3")
check string.fromBytes(await conn.readLp(1024)) == "line4"
asyncTest "SwitchBuilder withRelay":
let
maSrc = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
maRel = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
maDst = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
srcWR = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ maSrc ])
.withTcpTransport()
.withMplex()
.withNoise()
.withRelayTransport(false)
.build()
relWR = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ maRel ])
.withTcpTransport()
.withMplex()
.withNoise()
.withRelayTransport(true)
.build()
dstWR = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ maDst ])
.withTcpTransport()
.withMplex()
.withNoise()
.withRelayTransport(false)
.build()
dstWR.mount(customProto)
await srcWR.start()
await dstWR.start()
await relWR.start()
let maStr = $relWR.peerInfo.addrs[0] & "/p2p/" & $relWR.peerInfo.peerId & "/p2p-circuit/p2p/" & $dstWR.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
await srcWR.connect(relWR.peerInfo.peerId, relWR.peerInfo.addrs)
await relWR.connect(dstWR.peerInfo.peerId, dstWR.peerInfo.addrs)
conn = await srcWR.dial(dstWR.peerInfo.peerId, @[ maddr ], protos[0])
await conn.writeLp("line1")
check string.fromBytes(await conn.readLp(1024)) == "line2"
await conn.writeLp("line3")
check string.fromBytes(await conn.readLp(1024)) == "line4"
await allFutures(srcWR.stop(), dstWR.stop(), relWR.stop())
asyncTest "Bad MultiAddress":
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await rel.connect(dst.peerInfo.peerId, dst.peerInfo.addrs)
expect(CatchableError):
let maStr = $rel.peerInfo.addrs[0] & "/p2p/" & $rel.peerInfo.peerId & "/p2p/" & $dst.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
expect(CatchableError):
let maStr = $rel.peerInfo.addrs[0] & "/p2p/" & $rel.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
expect(CatchableError):
let maStr = "/ip4/127.0.0.1"
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
expect(CatchableError):
let maStr = $dst.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])

293
tests/testrelayv1.nim Normal file
View File

@ -0,0 +1,293 @@
{.used.}
import options, bearssl, chronos
import stew/byteutils
import ../libp2p/[protocols/relay/relay,
protocols/relay/client,
protocols/relay/messages,
protocols/relay/utils,
protocols/relay/rtransport,
multiaddress,
peerinfo,
peerid,
stream/connection,
multistream,
transports/transport,
switch,
builders,
upgrademngrs/upgrade,
varint,
daemon/daemonapi]
import ./helpers
proc new(T: typedesc[RelayTransport], relay: Relay): T =
T.new(relay = relay, upgrader = relay.switch.transports[0].upgrader)
suite "Circuit Relay":
asyncTeardown:
await allFutures(src.stop(), dst.stop(), srelay.stop())
checkTrackers()
var
protos {.threadvar.}: seq[string]
customProto {.threadvar.}: LPProtocol
ma {.threadvar.}: MultiAddress
src {.threadvar.}: Switch
dst {.threadvar.}: Switch
srelay {.threadvar.}: Switch
clSrc {.threadvar.}: RelayClient
clDst {.threadvar.}: RelayClient
r {.threadvar.}: Relay
conn {.threadvar.}: Connection
msg {.threadvar.}: ProtoBuffer
rcv {.threadvar.}: Option[RelayMessage]
proc createMsg(
msgType: Option[RelayType] = RelayType.none,
status: Option[StatusV1] = StatusV1.none,
src: Option[RelayPeer] = RelayPeer.none,
dst: Option[RelayPeer] = RelayPeer.none): ProtoBuffer =
encode(RelayMessage(msgType: msgType, srcPeer: src, dstPeer: dst, status: status))
proc checkMsg(msg: Option[RelayMessage],
msgType: Option[RelayType] = none[RelayType](),
status: Option[StatusV1] = none[StatusV1](),
src: Option[RelayPeer] = none[RelayPeer](),
dst: Option[RelayPeer] = none[RelayPeer]()) =
check: msg.isSome
let m = msg.get()
check: m.msgType == msgType
check: m.status == status
check: m.srcPeer == src
check: m.dstPeer == dst
proc customHandler(conn: Connection, proto: string) {.async.} =
check "line1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("line2")
check "line3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("line4")
await conn.close()
asyncSetup:
# Create a custom prototype
protos = @[ "/customProto", RelayV1Codec ]
customProto = new LPProtocol
customProto.handler = customHandler
customProto.codec = protos[0]
ma = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
clSrc = RelayClient.new()
clDst = RelayClient.new()
r = Relay.new(circuitRelayV1=true)
src = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
.withTcpTransport()
.withMplex()
.withNoise()
.withCircuitRelay(clSrc)
.build()
dst = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
.withTcpTransport()
.withMplex()
.withNoise()
.withCircuitRelay(clDst)
.build()
srelay = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
.withTcpTransport()
.withMplex()
.withNoise()
.withCircuitRelay(r)
.build()
dst.mount(customProto)
await src.start()
await dst.start()
await srelay.start()
asyncTest "Handle CanHop":
msg = createMsg(some(CanHop))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(StatusV1.Success))
conn = await src.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayV1Codec)
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantSpeakRelay))
await conn.close()
asyncTest "Malformed":
conn = await srelay.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Status))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
await conn.close()
rcv.checkMsg(some(RelayType.Status), some(StatusV1.MalformedMessage))
asyncTest "Handle Stop Error":
conn = await srelay.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Stop),
none(StatusV1),
none(RelayPeer),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(StopSrcMultiaddrInvalid))
conn = await srelay.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Stop),
none(StatusV1),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
none(RelayPeer))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(StopDstMultiaddrInvalid))
conn = await srelay.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Stop),
none(StatusV1),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
await conn.close()
rcv.checkMsg(some(RelayType.Status), some(StopDstMultiaddrInvalid))
asyncTest "Handle Hop Error":
conn = await src.dial(dst.peerInfo.peerId, dst.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantSpeakRelay))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
none(RelayPeer),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopSrcMultiaddrInvalid))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopSrcMultiaddrInvalid))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
none(RelayPeer))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopDstMultiaddrInvalid))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: srelay.peerInfo.peerId, addrs: srelay.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantRelayToSelf))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: srelay.peerInfo.peerId, addrs: srelay.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantRelayToSelf))
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: dst.peerInfo.peerId, addrs: dst.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopNoConnToDst))
await srelay.connect(dst.peerInfo.peerId, dst.peerInfo.addrs)
var tmp = r.maxCircuit
r.maxCircuit = 0
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantSpeakRelay))
r.maxCircuit = tmp
await conn.close()
tmp = r.maxCircuitPerPeer
r.maxCircuitPerPeer = 0
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantSpeakRelay))
r.maxCircuitPerPeer = tmp
await conn.close()
let dst2 = newStandardSwitch()
await dst2.start()
await srelay.connect(dst2.peerInfo.peerId, dst2.peerInfo.addrs)
conn = await src.dial(srelay.peerInfo.peerId, srelay.peerInfo.addrs, RelayV1Codec)
msg = createMsg(some(RelayType.Hop),
none(StatusV1),
some(RelayPeer(peerId: src.peerInfo.peerId, addrs: src.peerInfo.addrs)),
some(RelayPeer(peerId: dst2.peerInfo.peerId, addrs: dst2.peerInfo.addrs)))
await conn.writeLp(msg.buffer)
rcv = RelayMessage.decode(await conn.readLp(1024))
rcv.checkMsg(some(RelayType.Status), some(HopCantDialDst))
await allFutures(dst2.stop())
asyncTest "Dial Peer":
let maStr = $srelay.peerInfo.addrs[0] & "/p2p/" & $srelay.peerInfo.peerId & "/p2p-circuit/p2p/" & $dst.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
await src.connect(srelay.peerInfo.peerId, srelay.peerInfo.addrs)
await srelay.connect(dst.peerInfo.peerId, dst.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
await conn.writeLp("line1")
check string.fromBytes(await conn.readLp(1024)) == "line2"
await conn.writeLp("line3")
check string.fromBytes(await conn.readLp(1024)) == "line4"
asyncTest "Bad MultiAddress":
await src.connect(srelay.peerInfo.peerId, srelay.peerInfo.addrs)
await srelay.connect(dst.peerInfo.peerId, dst.peerInfo.addrs)
expect(CatchableError):
let maStr = $srelay.peerInfo.addrs[0] & "/p2p/" & $srelay.peerInfo.peerId & "/p2p/" & $dst.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
expect(CatchableError):
let maStr = $srelay.peerInfo.addrs[0] & "/p2p/" & $srelay.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
expect(CatchableError):
let maStr = "/ip4/127.0.0.1"
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])
expect(CatchableError):
let maStr = $dst.peerInfo.peerId
let maddr = MultiAddress.init(maStr).tryGet()
conn = await src.dial(dst.peerInfo.peerId, @[ maddr ], protos[0])

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tests/testrelayv2.nim Normal file
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@ -0,0 +1,412 @@
{.used.}
import bearssl, chronos, options
import ../libp2p
import ../libp2p/[protocols/relay/relay,
protocols/relay/messages,
protocols/relay/utils,
protocols/relay/client]
import ./helpers
import std/times
import stew/byteutils
proc createSwitch(r: Relay): Switch =
result = SwitchBuilder.new()
.withRng(newRng())
.withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
.withTcpTransport()
.withMplex()
.withNoise()
.withCircuitRelay(r)
.build()
suite "Circuit Relay V2":
suite "Reservation":
asyncTeardown:
await allFutures(src1.stop(), src2.stop(), rel.stop())
checkTrackers()
var
ttl {.threadvar.}: int
ldur {.threadvar.}: uint32
ldata {.threadvar.}: uint64
cl1 {.threadvar.}: RelayClient
cl2 {.threadvar.}: RelayClient
rv2 {.threadvar.}: Relay
src1 {.threadvar.}: Switch
src2 {.threadvar.}: Switch
rel {.threadvar.}: Switch
rsvp {.threadvar.}: Rsvp
range {.threadvar.}: HSlice[times.DateTime, times.DateTime]
asyncSetup:
ttl = 1
ldur = 60
ldata = 2048
cl1 = RelayClient.new()
cl2 = RelayClient.new()
rv2 = Relay.new(reservationTTL=initDuration(seconds=ttl),
limitDuration=ldur,
limitData=ldata,
maxCircuit=1)
src1 = createSwitch(cl1)
src2 = createSwitch(cl2)
rel = createSwitch(rv2)
await src1.start()
await src2.start()
await rel.start()
await src1.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await src2.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
rsvp = await cl1.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
range = now().utc + (ttl-3).seconds..now().utc + (ttl+3).seconds
check:
rsvp.expire.int64.fromUnix.utc in range
rsvp.limitDuration == ldur
rsvp.limitData == ldata
asyncTest "Too many reservations":
let conn = await cl2.switch.dial(rel.peerInfo.peerId, rel.peerInfo.addrs, RelayV2HopCodec)
let pb = encode(HopMessage(msgType: HopMessageType.Reserve))
await conn.writeLp(pb.buffer)
let msg = HopMessage.decode(await conn.readLp(RelayMsgSize)).get()
check:
msg.msgType == HopMessageType.Status
msg.status == some(StatusV2.ReservationRefused)
asyncTest "Too many reservations + Reconnect":
expect(ReservationError):
discard await cl2.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
await rel.disconnect(src1.peerInfo.peerId)
rsvp = await cl2.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
range = now().utc + (ttl-3).seconds..now().utc + (ttl+3).seconds
check:
rsvp.expire.int64.fromUnix.utc in range
rsvp.limitDuration == ldur
rsvp.limitData == ldata
asyncTest "Reservation ttl expires":
await sleepAsync(chronos.timer.seconds(ttl + 1))
rsvp = await cl1.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
range = now().utc + (ttl-3).seconds..now().utc + (ttl+3).seconds
check:
rsvp.expire.int64.fromUnix.utc in range
rsvp.limitDuration == ldur
rsvp.limitData == ldata
asyncTest "Reservation over relay":
let
rv2add = Relay.new()
addrs = @[ MultiAddress.init($rel.peerInfo.addrs[0] & "/p2p/" &
$rel.peerInfo.peerId & "/p2p-circuit/p2p/" &
$src2.peerInfo.peerId).get() ]
rv2add.setup(src2)
await rv2add.start()
src2.mount(rv2add)
rv2.maxCircuit.inc()
rsvp = await cl2.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
range = now().utc + (ttl-3).seconds..now().utc + (ttl+3).seconds
check:
rsvp.expire.int64.fromUnix.utc in range
rsvp.limitDuration == ldur
rsvp.limitData == ldata
expect(ReservationError):
discard await cl1.reserve(src2.peerInfo.peerId, addrs)
suite "Connection":
asyncTeardown:
checkTrackers()
var
addrs {.threadvar.}: MultiAddress
customProtoCodec {.threadvar.}: string
proto {.threadvar.}: LPProtocol
ttl {.threadvar.}: int
ldur {.threadvar.}: uint32
ldata {.threadvar.}: uint64
srcCl {.threadvar.}: RelayClient
dstCl {.threadvar.}: RelayClient
rv2 {.threadvar.}: Relay
src {.threadvar.}: Switch
dst {.threadvar.}: Switch
rel {.threadvar.}: Switch
rsvp {.threadvar.}: Rsvp
conn {.threadvar.}: Connection
asyncSetup:
customProtoCodec = "/test"
proto = new LPProtocol
proto.codec = customProtoCodec
ttl = 60
ldur = 120
ldata = 16384
srcCl = RelayClient.new()
dstCl = RelayClient.new()
src = createSwitch(srcCl)
dst = createSwitch(dstCl)
rel = newStandardSwitch()
addrs = MultiAddress.init($rel.peerInfo.addrs[0] & "/p2p/" &
$rel.peerInfo.peerId & "/p2p-circuit/p2p/" &
$dst.peerInfo.peerId).get()
asyncTest "Connection succeed":
proto.handler = proc(conn: Connection, proto: string) {.async.} =
check: "test1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("test2")
check: "test3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("test4")
await conn.close()
rv2 = Relay.new(reservationTTL=initDuration(seconds=ttl),
limitDuration=ldur,
limitData=ldata)
rv2.setup(rel)
rel.mount(rv2)
dst.mount(proto)
await rel.start()
await src.start()
await dst.start()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await dst.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
rsvp = await dstCl.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ addrs ], customProtoCodec)
await conn.writeLp("test1")
check: "test2" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("test3")
check: "test4" == string.fromBytes(await conn.readLp(1024))
await allFutures(conn.close())
await allFutures(src.stop(), dst.stop(), rel.stop())
asyncTest "Connection duration exceeded":
ldur = 2
proto.handler = proc(conn: Connection, proto: string) {.async.} =
check "wanna sleep?" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("yeah!")
check "go!" == string.fromBytes(await conn.readLp(1024))
await sleepAsync(3000)
await conn.writeLp("that was a cool power nap")
await conn.close()
rv2 = Relay.new(reservationTTL=initDuration(seconds=ttl),
limitDuration=ldur,
limitData=ldata)
rv2.setup(rel)
rel.mount(rv2)
dst.mount(proto)
await rel.start()
await src.start()
await dst.start()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await dst.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
rsvp = await dstCl.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ addrs ], customProtoCodec)
await conn.writeLp("wanna sleep?")
check: "yeah!" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("go!")
expect(LPStreamEOFError):
discard await conn.readLp(1024)
await allFutures(conn.close())
await allFutures(src.stop(), dst.stop(), rel.stop())
asyncTest "Connection data exceeded":
ldata = 1000
proto.handler = proc(conn: Connection, proto: string) {.async.} =
check "count me the better story you know" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("do you expect a lorem ipsum or...?")
check "surprise me!" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("""Call me Ishmael. Some years ago--never mind how long
precisely--having little or no money in my purse, and nothing
particular to interest me on shore, I thought I would sail about a
little and see the watery part of the world. It is a way I have of
driving off the spleen and regulating the circulation. Whenever I
find myself growing grim about the mouth; whenever it is a damp,
drizzly November in my soul; whenever I find myself involuntarily
pausing before coffin warehouses, and bringing up the rear of every
funeral I meet; and especially whenever my hypos get such an upper
hand of me, that it requires a strong moral principle to prevent me
from deliberately stepping into the street, and methodically knocking
people's hats off--then, I account it high time to get to sea as soon
as I can. This is my substitute for pistol and ball. With a
philosophical flourish Cato throws himself upon his sword; I quietly
take to the ship.""")
rv2 = Relay.new(reservationTTL=initDuration(seconds=ttl),
limitDuration=ldur,
limitData=ldata)
rv2.setup(rel)
rel.mount(rv2)
dst.mount(proto)
await rel.start()
await src.start()
await dst.start()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await dst.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
rsvp = await dstCl.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ addrs ], customProtoCodec)
await conn.writeLp("count me the better story you know")
check: "do you expect a lorem ipsum or...?" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("surprise me!")
expect(LPStreamEOFError):
discard await conn.readLp(1024)
await allFutures(conn.close())
await allFutures(src.stop(), dst.stop(), rel.stop())
asyncTest "Reservation ttl expire during connection":
ttl = 1
proto.handler = proc(conn: Connection, proto: string) {.async.} =
check: "test1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("test2")
check: "test3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("test4")
await conn.close()
rv2 = Relay.new(reservationTTL=initDuration(seconds=ttl),
limitDuration=ldur,
limitData=ldata)
rv2.setup(rel)
rel.mount(rv2)
dst.mount(proto)
await rel.start()
await src.start()
await dst.start()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await dst.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
rsvp = await dstCl.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ addrs ], customProtoCodec)
await conn.writeLp("test1")
check: "test2" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("test3")
check: "test4" == string.fromBytes(await conn.readLp(1024))
await src.disconnect(rel.peerInfo.peerId)
await sleepAsync(2000)
expect(DialFailedError):
check: conn.atEof()
await conn.close()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
conn = await src.dial(dst.peerInfo.peerId, @[ addrs ], customProtoCodec)
await allFutures(conn.close())
await allFutures(src.stop(), dst.stop(), rel.stop())
asyncTest "Connection over relay":
# src => rel => rel2 => dst
# rel2 reserve rel
# dst reserve rel2
# src try to connect with dst
proto.handler = proc(conn: Connection, proto: string) {.async.} =
raise newException(CatchableError, "Should not be here")
let
rel2Cl = RelayClient.new(canHop = true)
rel2 = createSwitch(rel2Cl)
rv2 = Relay.new()
addrs = @[ MultiAddress.init($rel.peerInfo.addrs[0] & "/p2p/" &
$rel.peerInfo.peerId & "/p2p-circuit/p2p/" &
$rel2.peerInfo.peerId & "/p2p/" &
$rel2.peerInfo.peerId & "/p2p-circuit/p2p/" &
$dst.peerInfo.peerId).get() ]
rv2.setup(rel)
rel.mount(rv2)
dst.mount(proto)
await rel.start()
await rel2.start()
await src.start()
await dst.start()
await src.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await rel2.connect(rel.peerInfo.peerId, rel.peerInfo.addrs)
await dst.connect(rel2.peerInfo.peerId, rel2.peerInfo.addrs)
rsvp = await rel2Cl.reserve(rel.peerInfo.peerId, rel.peerInfo.addrs)
let rsvp2 = await dstCl.reserve(rel2.peerInfo.peerId, rel2.peerInfo.addrs)
expect(DialFailedError):
conn = await src.dial(dst.peerInfo.peerId, addrs, customProtoCodec)
await allFutures(conn.close())
await allFutures(src.stop(), dst.stop(), rel.stop(), rel2.stop())
asyncTest "Connection using ClientRelay":
var
protoABC = new LPProtocol
protoBCA = new LPProtocol
protoCAB = new LPProtocol
protoABC.codec = "/abctest"
protoABC.handler = proc(conn: Connection, proto: string) {.async.} =
check: "testABC1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("testABC2")
check: "testABC3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("testABC4")
await conn.close()
protoBCA.codec = "/bcatest"
protoBCA.handler = proc(conn: Connection, proto: string) {.async.} =
check: "testBCA1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("testBCA2")
check: "testBCA3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("testBCA4")
await conn.close()
protoCAB.codec = "/cabtest"
protoCAB.handler = proc(conn: Connection, proto: string) {.async.} =
check: "testCAB1" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("testCAB2")
check: "testCAB3" == string.fromBytes(await conn.readLp(1024))
await conn.writeLp("testCAB4")
await conn.close()
let
clientA = RelayClient.new(canHop = true)
clientB = RelayClient.new(canHop = true)
clientC = RelayClient.new(canHop = true)
switchA = createSwitch(clientA)
switchB = createSwitch(clientB)
switchC = createSwitch(clientC)
addrsABC = MultiAddress.init($switchB.peerInfo.addrs[0] & "/p2p/" &
$switchB.peerInfo.peerId & "/p2p-circuit/p2p/" &
$switchC.peerInfo.peerId).get()
addrsBCA = MultiAddress.init($switchC.peerInfo.addrs[0] & "/p2p/" &
$switchC.peerInfo.peerId & "/p2p-circuit/p2p/" &
$switchA.peerInfo.peerId).get()
addrsCAB = MultiAddress.init($switchA.peerInfo.addrs[0] & "/p2p/" &
$switchA.peerInfo.peerId & "/p2p-circuit/p2p/" &
$switchB.peerInfo.peerId).get()
switchA.mount(protoBCA)
switchB.mount(protoCAB)
switchC.mount(protoABC)
await switchA.start()
await switchB.start()
await switchC.start()
await switchA.connect(switchB.peerInfo.peerId, switchB.peerInfo.addrs)
await switchB.connect(switchC.peerInfo.peerId, switchC.peerInfo.addrs)
await switchC.connect(switchA.peerInfo.peerId, switchA.peerInfo.addrs)
let rsvpABC = await clientA.reserve(switchC.peerInfo.peerId, switchC.peerInfo.addrs)
let rsvpBCA = await clientB.reserve(switchA.peerInfo.peerId, switchA.peerInfo.addrs)
let rsvpCAB = await clientC.reserve(switchB.peerInfo.peerId, switchB.peerInfo.addrs)
let connABC = await switchA.dial(switchC.peerInfo.peerId, @[ addrsABC ], "/abctest")
let connBCA = await switchB.dial(switchA.peerInfo.peerId, @[ addrsBCA ], "/bcatest")
let connCAB = await switchC.dial(switchB.peerInfo.peerId, @[ addrsCAB ], "/cabtest")
await connABC.writeLp("testABC1")
await connBCA.writeLp("testBCA1")
await connCAB.writeLp("testCAB1")
check:
"testABC2" == string.fromBytes(await connABC.readLp(1024))
"testBCA2" == string.fromBytes(await connBCA.readLp(1024))
"testCAB2" == string.fromBytes(await connCAB.readLp(1024))
await connABC.writeLp("testABC3")
await connBCA.writeLp("testBCA3")
await connCAB.writeLp("testCAB3")
check:
"testABC4" == string.fromBytes(await connABC.readLp(1024))
"testBCA4" == string.fromBytes(await connBCA.readLp(1024))
"testCAB4" == string.fromBytes(await connCAB.readLp(1024))
await allFutures(connABC.close(), connBCA.close(), connCAB.close())
await allFutures(switchA.stop(), switchB.stop(), switchC.stop())