mirror of https://github.com/vacp2p/nim-libp2p.git
avoid send deadlock by not allowing send to block (#342)
* avoid send deadlock by not allowing send to block * handle message issues more consistently
This commit is contained in:
Jacek Sieka
GitHub
parent
d3182c4dba
commit
cd1c68dbc5
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@ -63,50 +63,38 @@ method unsubscribePeer*(f: FloodSub, peer: PeerID) =
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method rpcHandler*(f: FloodSub,
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peer: PubSubPeer,
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rpcMsgs: seq[RPCMsg]) {.async.} =
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await procCall PubSub(f).rpcHandler(peer, rpcMsgs)
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rpcMsg: RPCMsg) {.async.} =
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await procCall PubSub(f).rpcHandler(peer, rpcMsg)
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for m in rpcMsgs: # for all RPC messages
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if m.messages.len > 0: # if there are any messages
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var toSendPeers = initHashSet[PubSubPeer]()
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for msg in m.messages: # for every message
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let msgId = f.msgIdProvider(msg)
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logScope: msgId
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if rpcMsg.messages.len > 0: # if there are any messages
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var toSendPeers = initHashSet[PubSubPeer]()
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for msg in rpcMsg.messages: # for every message
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let msgId = f.msgIdProvider(msg)
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logScope: msgId
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if msgId notin f.seen:
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f.seen.put(msgId) # add the message to the seen cache
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if msgId notin f.seen:
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f.seen.put(msgId) # add the message to the seen cache
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if f.verifySignature and not msg.verify(peer.peerId):
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trace "dropping message due to failed signature verification"
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continue
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if f.verifySignature and not msg.verify(peer.peerId):
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trace "dropping message due to failed signature verification"
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continue
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if not (await f.validate(msg)):
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trace "dropping message due to failed validation"
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continue
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if not (await f.validate(msg)):
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trace "dropping message due to failed validation"
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continue
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for t in msg.topicIDs: # for every topic in the message
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if t in f.floodsub:
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toSendPeers.incl(f.floodsub[t]) # get all the peers interested in this topic
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if t in f.topics: # check that we're subscribed to it
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for h in f.topics[t].handler:
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trace "calling handler for message", topicId = t,
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localPeer = f.peerInfo.id,
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fromPeer = msg.fromPeer.pretty
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for t in msg.topicIDs: # for every topic in the message
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if t in f.floodsub:
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toSendPeers.incl(f.floodsub[t]) # get all the peers interested in this topic
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try:
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await h(t, msg.data) # trigger user provided handler
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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trace "exception in message handler", exc = exc.msg
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await handleData(f, t, msg.data)
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# forward the message to all peers interested in it
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let published = await f.broadcast(
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toSeq(toSendPeers),
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RPCMsg(messages: m.messages),
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DefaultSendTimeout)
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# forward the message to all peers interested in it
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f.broadcast(
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toSeq(toSendPeers),
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RPCMsg(messages: rpcMsg.messages))
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trace "forwared message to peers", peers = published
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trace "forwared message to peers", peers = toSendPeers.len
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method init*(f: FloodSub) =
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proc handler(conn: Connection, proto: string) {.async.} =
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@ -122,14 +110,13 @@ method init*(f: FloodSub) =
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method publish*(f: FloodSub,
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topic: string,
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data: seq[byte],
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timeout: Duration = InfiniteDuration): Future[int] {.async.} =
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data: seq[byte]): Future[int] {.async.} =
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# base returns always 0
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discard await procCall PubSub(f).publish(topic, data, timeout)
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discard await procCall PubSub(f).publish(topic, data)
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if data.len <= 0 or topic.len <= 0:
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trace "topic or data missing, skipping publish"
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return
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return 0
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if topic notin f.floodsub:
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trace "missing peers for topic, skipping publish"
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@ -137,33 +124,34 @@ method publish*(f: FloodSub,
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trace "publishing on topic", name = topic
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inc f.msgSeqno
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let msg = Message.init(f.peerInfo, data, topic, f.msgSeqno, f.sign)
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let
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msg = Message.init(f.peerInfo, data, topic, f.msgSeqno, f.sign)
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peers = toSeq(f.floodsub.getOrDefault(topic))
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# start the future but do not wait yet
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let published = await f.broadcast(
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toSeq(f.floodsub.getOrDefault(topic)),
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RPCMsg(messages: @[msg]),
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timeout)
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f.broadcast(
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peers,
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RPCMsg(messages: @[msg]))
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when defined(libp2p_expensive_metrics):
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libp2p_pubsub_messages_published.inc(labelValues = [topic])
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trace "published message to peers", peers = published,
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trace "published message to peers", peers = peers.len,
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msg = msg.shortLog()
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return published
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return peers.len
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method unsubscribe*(f: FloodSub,
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topics: seq[TopicPair]) {.async.} =
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await procCall PubSub(f).unsubscribe(topics)
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for p in f.peers.values:
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discard await f.sendSubs(p, topics.mapIt(it.topic).deduplicate(), false)
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f.sendSubs(p, topics.mapIt(it.topic).deduplicate(), false)
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method unsubscribeAll*(f: FloodSub, topic: string) {.async.} =
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await procCall PubSub(f).unsubscribeAll(topic)
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for p in f.peers.values:
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discard await f.sendSubs(p, @[topic], false)
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f.sendSubs(p, @[topic], false)
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method initPubSub*(f: FloodSub) =
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procCall PubSub(f).initPubSub()
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@ -157,10 +157,10 @@ proc rebalanceMesh(g: GossipSub, topic: string) {.async.} =
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# Send changes to peers after table updates to avoid stale state
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if grafts.len > 0:
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let graft = RPCMsg(control: some(ControlMessage(graft: @[ControlGraft(topicID: topic)])))
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discard await g.broadcast(grafts, graft, DefaultSendTimeout)
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g.broadcast(grafts, graft)
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if prunes.len > 0:
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let prune = RPCMsg(control: some(ControlMessage(prune: @[ControlPrune(topicID: topic)])))
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discard await g.broadcast(prunes, prune, DefaultSendTimeout)
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g.broadcast(prunes, prune)
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proc dropFanoutPeers(g: GossipSub) =
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# drop peers that we haven't published to in
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@ -229,14 +229,11 @@ proc heartbeat(g: GossipSub) {.async.} =
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g.replenishFanout(t)
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let peers = g.getGossipPeers()
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var sent: seq[Future[bool]]
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for peer, control in peers:
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g.peers.withValue(peer.peerId, pubsubPeer) do:
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sent &= g.send(
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g.send(
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pubsubPeer[],
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RPCMsg(control: some(control)),
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DefaultSendTimeout)
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checkFutures(await allFinished(sent))
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RPCMsg(control: some(control)))
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g.mcache.shift() # shift the cache
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except CancelledError as exc:
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@ -379,89 +376,68 @@ proc handleIWant(g: GossipSub,
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method rpcHandler*(g: GossipSub,
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peer: PubSubPeer,
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rpcMsgs: seq[RPCMsg]) {.async.} =
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await procCall PubSub(g).rpcHandler(peer, rpcMsgs)
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rpcMsg: RPCMsg) {.async.} =
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await procCall PubSub(g).rpcHandler(peer, rpcMsg)
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for m in rpcMsgs: # for all RPC messages
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if m.messages.len > 0: # if there are any messages
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var toSendPeers: HashSet[PubSubPeer]
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for msg in m.messages: # for every message
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let msgId = g.msgIdProvider(msg)
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logScope: msgId
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if rpcMsg.messages.len > 0: # if there are any messages
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var toSendPeers: HashSet[PubSubPeer]
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for msg in rpcMsg.messages: # for every message
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let msgId = g.msgIdProvider(msg)
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logScope: msgId
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if msgId in g.seen:
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trace "message already processed, skipping"
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continue
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if msgId in g.seen:
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trace "message already processed, skipping"
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continue
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trace "processing message"
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trace "processing message"
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g.seen.put(msgId) # add the message to the seen cache
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g.seen.put(msgId) # add the message to the seen cache
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if g.verifySignature and not msg.verify(peer.peerId):
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trace "dropping message due to failed signature verification"
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continue
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if g.verifySignature and not msg.verify(peer.peerId):
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trace "dropping message due to failed signature verification"
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continue
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if not (await g.validate(msg)):
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trace "dropping message due to failed validation"
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continue
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if not (await g.validate(msg)):
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trace "dropping message due to failed validation"
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continue
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# this shouldn't happen
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if g.peerInfo.peerId == msg.fromPeer:
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trace "skipping messages from self"
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continue
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# this shouldn't happen
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if g.peerInfo.peerId == msg.fromPeer:
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trace "skipping messages from self"
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continue
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for t in msg.topicIDs: # for every topic in the message
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if t in g.floodsub:
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toSendPeers.incl(g.floodsub[t]) # get all floodsub peers for topic
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for t in msg.topicIDs: # for every topic in the message
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if t in g.floodsub:
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toSendPeers.incl(g.floodsub[t]) # get all floodsub peers for topic
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if t in g.mesh:
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toSendPeers.incl(g.mesh[t]) # get all mesh peers for topic
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if t in g.mesh:
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toSendPeers.incl(g.mesh[t]) # get all mesh peers for topic
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if t in g.topics: # if we're subscribed to the topic
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for h in g.topics[t].handler:
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trace "calling handler for message", topicId = t,
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localPeer = g.peerInfo.id,
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fromPeer = msg.fromPeer.pretty
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try:
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await h(t, msg.data) # trigger user provided handler
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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trace "exception in message handler", exc = exc.msg
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await handleData(g, t, msg.data)
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# forward the message to all peers interested in it
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let published = await g.broadcast(
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toSeq(toSendPeers),
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RPCMsg(messages: m.messages),
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DefaultSendTimeout)
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# forward the message to all peers interested in it
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g.broadcast(
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toSeq(toSendPeers),
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RPCMsg(messages: rpcMsg.messages))
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trace "forwared message to peers", peers = published
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trace "forwared message to peers", peers = toSendPeers.len
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if rpcMsg.control.isSome:
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let control = rpcMsg.control.get()
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g.handlePrune(peer, control.prune)
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var respControl: ControlMessage
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if m.control.isSome:
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let control = m.control.get()
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g.handlePrune(peer, control.prune)
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respControl.iwant.add(g.handleIHave(peer, control.ihave))
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respControl.prune.add(g.handleGraft(peer, control.graft))
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let messages = g.handleIWant(peer, control.iwant)
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respControl.iwant.add(g.handleIHave(peer, control.ihave))
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respControl.prune.add(g.handleGraft(peer, control.graft))
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let messages = g.handleIWant(peer, control.iwant)
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if respControl.graft.len > 0 or respControl.prune.len > 0 or
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respControl.ihave.len > 0 or messages.len > 0:
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if respControl.graft.len > 0 or respControl.prune.len > 0 or
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respControl.ihave.len > 0:
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try:
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info "sending control message", msg = respControl
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let sent = await g.send(
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peer,
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RPCMsg(control: some(respControl), messages: messages),
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DefaultSendTimeout)
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if not sent:
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g.unsubscribePeer(peer.peerId)
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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trace "exception forwarding control messages", exc = exc.msg
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debug "sending control message", msg = shortLog(respControl)
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g.send(
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peer,
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RPCMsg(control: some(respControl), messages: messages))
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method subscribe*(g: GossipSub,
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topic: string,
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@ -481,7 +457,7 @@ method unsubscribe*(g: GossipSub,
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g.mesh.del(topic)
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let prune = RPCMsg(control: some(ControlMessage(prune: @[ControlPrune(topicID: topic)])))
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discard await g.broadcast(toSeq(peers), prune, DefaultSendTimeout)
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g.broadcast(toSeq(peers), prune)
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method unsubscribeAll*(g: GossipSub, topic: string) {.async.} =
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await procCall PubSub(g).unsubscribeAll(topic)
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@ -491,14 +467,13 @@ method unsubscribeAll*(g: GossipSub, topic: string) {.async.} =
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g.mesh.del(topic)
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let prune = RPCMsg(control: some(ControlMessage(prune: @[ControlPrune(topicID: topic)])))
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discard await g.broadcast(toSeq(peers), prune, DefaultSendTimeout)
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g.broadcast(toSeq(peers), prune)
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method publish*(g: GossipSub,
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topic: string,
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data: seq[byte],
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timeout: Duration = InfiniteDuration): Future[int] {.async.} =
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data: seq[byte]): Future[int] {.async.} =
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# base returns always 0
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discard await procCall PubSub(g).publish(topic, data, timeout)
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discard await procCall PubSub(g).publish(topic, data)
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trace "publishing message on topic", topic, data = data.shortLog
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if topic.len <= 0: # data could be 0/empty
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@ -533,14 +508,14 @@ method publish*(g: GossipSub,
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g.mcache.put(msgId, msg)
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if peers.len > 0:
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let published = await g.broadcast(toSeq(peers), RPCMsg(messages: @[msg]), timeout)
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g.broadcast(toSeq(peers), RPCMsg(messages: @[msg]))
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when defined(libp2p_expensive_metrics):
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if published > 0:
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if peers.len > 0:
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libp2p_pubsub_messages_published.inc(labelValues = [topic])
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trace "published message to peers", peers = published,
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trace "published message to peers", peers = peers.len,
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msg = msg.shortLog()
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return published
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return peers.len
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else:
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debug "No peers for gossip message", topic, msg = msg.shortLog()
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return 0
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@ -66,54 +66,38 @@ method unsubscribePeer*(p: PubSub, peerId: PeerID) {.base.} =
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##
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trace "unsubscribing pubsub peer", peer = $peerId
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if peerId in p.peers:
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p.peers.del(peerId)
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p.peers.del(peerId)
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libp2p_pubsub_peers.set(p.peers.len.int64)
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proc send*(
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p: PubSub,
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peer: PubSubPeer,
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msg: RPCMsg,
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timeout: Duration): Future[bool] {.async.} =
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msg: RPCMsg) =
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## send to remote peer
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##
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trace "sending pubsub message to peer", peer = $peer, msg = shortLog(msg)
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try:
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await peer.send(msg, timeout)
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return true
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except CancelledError as exc:
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raise exc
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except CatchableError as exc:
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trace "exception sending pubsub message to peer",
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peer = $peer, msg = shortLog(msg)
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p.unsubscribePeer(peer.peerId)
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peer.send(msg)
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proc broadcast*(
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p: PubSub,
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sendPeers: seq[PubSubPeer],
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msg: RPCMsg,
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timeout: Duration): Future[int] {.async.} =
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## send messages and cleanup failed peers
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sendPeers: openArray[PubSubPeer],
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msg: RPCMsg) = # raises: [Defect]
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## send messages - returns number of send attempts made.
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##
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trace "broadcasting messages to peers",
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peers = sendPeers.len, message = shortLog(msg)
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let sent = await allFinished(
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sendPeers.mapIt( p.send(it, msg, timeout) ))
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return sent.filterIt( it.finished and it.read ).len
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for peer in sendPeers:
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p.send(peer, msg)
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proc sendSubs*(p: PubSub,
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peer: PubSubPeer,
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topics: seq[string],
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subscribe: bool): Future[bool] =
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subscribe: bool) =
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## send subscriptions to remote peer
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p.send(
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peer,
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RPCMsg(
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subscriptions: topics.mapIt(SubOpts(subscribe: subscribe, topic: it))),
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DefaultSendTimeout)
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p.send(peer, RPCMsg.withSubs(topics, subscribe))
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method subscribeTopic*(p: PubSub,
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topic: string,
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@ -124,16 +108,14 @@ method subscribeTopic*(p: PubSub,
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method rpcHandler*(p: PubSub,
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peer: PubSubPeer,
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rpcMsgs: seq[RPCMsg]) {.async, base.} =
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rpcMsg: RPCMsg) {.async, base.} =
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## handle rpc messages
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trace "processing RPC message", peer = peer.id, msgs = rpcMsgs.len
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logScope: peer = peer.id
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for m in rpcMsgs: # for all RPC messages
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trace "processing messages", msg = m.shortLog
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if m.subscriptions.len > 0: # if there are any subscriptions
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for s in m.subscriptions: # subscribe/unsubscribe the peer for each topic
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trace "about to subscribe to topic", topicId = s.topic
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p.subscribeTopic(s.topic, s.subscribe, peer)
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trace "processing RPC message", msg = rpcMsg.shortLog
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for s in rpcMsg.subscriptions: # subscribe/unsubscribe the peer for each topic
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trace "about to subscribe to topic", topicId = s.topic
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p.subscribeTopic(s.topic, s.subscribe, peer)
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||||
proc getOrCreatePeer*(
|
||||
p: PubSub,
|
||||
|
|
@ -142,16 +124,36 @@ proc getOrCreatePeer*(
|
|||
if peer in p.peers:
|
||||
return p.peers[peer]
|
||||
|
||||
proc getConn(): Future[(Connection, RPCMsg)] {.async.} =
|
||||
let conn = await p.switch.dial(peer, proto)
|
||||
return (conn, RPCMsg.withSubs(toSeq(p.topics.keys), true))
|
||||
|
||||
# create new pubsub peer
|
||||
let pubSubPeer = newPubSubPeer(peer, p.switch, proto)
|
||||
let pubSubPeer = newPubSubPeer(peer, getConn, proto)
|
||||
trace "created new pubsub peer", peerId = $peer
|
||||
|
||||
p.peers[peer] = pubSubPeer
|
||||
pubSubPeer.observers = p.observers
|
||||
|
||||
libp2p_pubsub_peers.set(p.peers.len.int64)
|
||||
|
||||
pubsubPeer.connect()
|
||||
|
||||
return pubSubPeer
|
||||
|
||||
proc handleData*(p: PubSub, topic: string, data: seq[byte]): Future[void] {.async.} =
|
||||
if topic notin p.topics: return # Not subscribed
|
||||
|
||||
for h in p.topics[topic].handler:
|
||||
trace "triggering handler", topicID = topic
|
||||
try:
|
||||
await h(topic, data)
|
||||
except CancelledError as exc:
|
||||
raise exc
|
||||
except CatchableError as exc:
|
||||
# Handlers should never raise exceptions
|
||||
warn "Error in topic handler", msg = exc.msg
|
||||
|
||||
method handleConn*(p: PubSub,
|
||||
conn: Connection,
|
||||
proto: string) {.base, async.} =
|
||||
|
|
@ -171,15 +173,13 @@ method handleConn*(p: PubSub,
|
|||
await conn.close()
|
||||
return
|
||||
|
||||
proc handler(peer: PubSubPeer, msgs: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg): Future[void] =
|
||||
# call pubsub rpc handler
|
||||
await p.rpcHandler(peer, msgs)
|
||||
p.rpcHandler(peer, msg)
|
||||
|
||||
let peer = p.getOrCreatePeer(conn.peerInfo.peerId, proto)
|
||||
|
||||
try:
|
||||
let peer = p.getOrCreatePeer(conn.peerInfo.peerId, proto)
|
||||
if p.topics.len > 0:
|
||||
discard await p.sendSubs(peer, toSeq(p.topics.keys), true)
|
||||
|
||||
peer.handler = handler
|
||||
await peer.handle(conn) # spawn peer read loop
|
||||
trace "pubsub peer handler ended", peer = peer.id
|
||||
|
|
@ -195,15 +195,7 @@ method subscribePeer*(p: PubSub, peer: PeerID) {.base.} =
|
|||
## messages
|
||||
##
|
||||
|
||||
let pubsubPeer = p.getOrCreatePeer(peer, p.codec)
|
||||
if p.topics.len > 0:
|
||||
# TODO sendSubs may raise, but doing asyncCheck here causes the exception
|
||||
# to escape to the poll loop.
|
||||
# With a bit of luck, it may be harmless to ignore exceptions here -
|
||||
# some cleanup is eventually done in PubSubPeer.send
|
||||
asyncCheck p.sendSubs(pubsubPeer, toSeq(p.topics.keys), true)
|
||||
|
||||
pubsubPeer.subscribed = true
|
||||
discard p.getOrCreatePeer(peer, p.codec)
|
||||
|
||||
method unsubscribe*(p: PubSub,
|
||||
topics: seq[TopicPair]) {.base, async.} =
|
||||
|
|
@ -249,32 +241,18 @@ method subscribe*(p: PubSub,
|
|||
|
||||
p.topics[topic].handler.add(handler)
|
||||
|
||||
var sent: seq[Future[bool]]
|
||||
for peer in toSeq(p.peers.values):
|
||||
sent.add(p.sendSubs(peer, @[topic], true))
|
||||
|
||||
checkFutures(await allFinished(sent))
|
||||
for _, peer in p.peers:
|
||||
p.sendSubs(peer, @[topic], true)
|
||||
|
||||
# metrics
|
||||
libp2p_pubsub_topics.set(p.topics.len.int64)
|
||||
|
||||
method publish*(p: PubSub,
|
||||
topic: string,
|
||||
data: seq[byte],
|
||||
timeout: Duration = InfiniteDuration): Future[int] {.base, async.} =
|
||||
data: seq[byte]): Future[int] {.base, async.} =
|
||||
## publish to a ``topic``
|
||||
if p.triggerSelf and topic in p.topics:
|
||||
for h in p.topics[topic].handler:
|
||||
trace "triggering handler", topicID = topic
|
||||
try:
|
||||
await h(topic, data)
|
||||
except CancelledError as exc:
|
||||
raise exc
|
||||
except CatchableError as exc:
|
||||
# TODO these exceptions are ignored since it's likely that if writes are
|
||||
# are failing, the underlying connection is already closed - this needs
|
||||
# more cleanup though
|
||||
debug "Could not write to pubsub connection", msg = exc.msg
|
||||
if p.triggerSelf:
|
||||
await handleData(p, topic, data)
|
||||
|
||||
return 0
|
||||
|
||||
|
|
|
|||
|
|
@ -28,27 +28,26 @@ when defined(libp2p_expensive_metrics):
|
|||
declareCounter(libp2p_pubsub_skipped_received_messages, "number of received skipped messages", labels = ["id"])
|
||||
declareCounter(libp2p_pubsub_skipped_sent_messages, "number of sent skipped messages", labels = ["id"])
|
||||
|
||||
const
|
||||
DefaultSendTimeout* = 10.seconds
|
||||
|
||||
type
|
||||
PubSubObserver* = ref object
|
||||
onRecv*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [Defect].}
|
||||
onSend*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [Defect].}
|
||||
|
||||
GetConn* = proc(): Future[(Connection, RPCMsg)] {.gcsafe.}
|
||||
|
||||
PubSubPeer* = ref object of RootObj
|
||||
switch*: Switch # switch instance to dial peers
|
||||
getConn*: GetConn # callback to establish a new send connection
|
||||
codec*: string # the protocol that this peer joined from
|
||||
sendConn: Connection # cached send connection
|
||||
connections*: seq[Connection] # connections to this peer
|
||||
peerId*: PeerID
|
||||
handler*: RPCHandler
|
||||
sentRpcCache: TimedCache[string] # cache for already sent messages
|
||||
recvdRpcCache: TimedCache[string] # cache for already received messages
|
||||
observers*: ref seq[PubSubObserver] # ref as in smart_ptr
|
||||
subscribed*: bool # are we subscribed to this peer
|
||||
dialLock: AsyncLock
|
||||
|
||||
RPCHandler* = proc(peer: PubSubPeer, msg: seq[RPCMsg]): Future[void] {.gcsafe.}
|
||||
RPCHandler* = proc(peer: PubSubPeer, msg: RPCMsg): Future[void] {.gcsafe.}
|
||||
|
||||
func hash*(p: PubSubPeer): Hash =
|
||||
# int is either 32/64, so intptr basically, pubsubpeer is a ref
|
||||
|
|
@ -78,13 +77,15 @@ proc sendObservers(p: PubSubPeer, msg: var RPCMsg) =
|
|||
|
||||
proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
|
||||
logScope:
|
||||
oid = $conn.oid
|
||||
peer = p.id
|
||||
closed = conn.closed
|
||||
|
||||
debug "starting pubsub read loop for peer", closed = conn.closed
|
||||
debug "starting pubsub read loop"
|
||||
try:
|
||||
try:
|
||||
while not conn.atEof:
|
||||
trace "waiting for data", closed = conn.closed
|
||||
trace "waiting for data"
|
||||
let data = await conn.readLp(64 * 1024)
|
||||
let digest = $(sha256.digest(data))
|
||||
trace "read data from peer", data = data.shortLog
|
||||
|
|
@ -111,10 +112,9 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
|
|||
# metrics
|
||||
libp2p_pubsub_received_messages.inc(labelValues = [p.id, t])
|
||||
|
||||
await p.handler(p, @[msg])
|
||||
await p.handler(p, msg)
|
||||
p.recvdRpcCache.put(digest)
|
||||
finally:
|
||||
debug "exiting pubsub peer read loop"
|
||||
await conn.close()
|
||||
|
||||
if p.sendConn == conn:
|
||||
|
|
@ -124,9 +124,14 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
|
|||
raise exc
|
||||
except CatchableError as exc:
|
||||
trace "Exception occurred in PubSubPeer.handle", exc = exc.msg
|
||||
finally:
|
||||
debug "exiting pubsub read loop"
|
||||
|
||||
proc getSendConn(p: PubSubPeer): Future[Connection] {.async.} =
|
||||
# get a cached send connection or create a new one
|
||||
## get a cached send connection or create a new one - will return nil if
|
||||
## getting a new connection fails
|
||||
##
|
||||
|
||||
block: # check if there's an existing connection that can be reused
|
||||
let current = p.sendConn
|
||||
|
||||
|
|
@ -147,7 +152,8 @@ proc getSendConn(p: PubSubPeer): Future[Connection] {.async.} =
|
|||
# and later close one of them, other implementations such as rust-libp2p
|
||||
# become deaf to our messages (potentially due to the clean-up associated
|
||||
# with closing connections). To prevent this, we use a lock that ensures
|
||||
# that only a single dial will be performed for each peer.
|
||||
# that only a single dial will be performed for each peer and send the
|
||||
# subscription table every time we reconnect.
|
||||
#
|
||||
# Nevertheless, this approach is still quite problematic because the gossip
|
||||
# sends and their respective dials may be started from the mplex read loop.
|
||||
|
|
@ -172,24 +178,35 @@ proc getSendConn(p: PubSubPeer): Future[Connection] {.async.} =
|
|||
return current
|
||||
|
||||
# Grab a new send connection
|
||||
let newConn = await p.switch.dial(p.peerId, p.codec) # ...and here
|
||||
let (newConn, handshake) = await p.getConn() # ...and here
|
||||
if newConn.isNil:
|
||||
return nil
|
||||
|
||||
trace "Sending handshake", oid = $newConn.oid, handshake = shortLog(handshake)
|
||||
await newConn.writeLp(encodeRpcMsg(handshake))
|
||||
|
||||
trace "Caching new send connection", oid = $newConn.oid
|
||||
p.sendConn = newConn
|
||||
asyncCheck p.handle(newConn) # start a read loop on the new connection
|
||||
return newConn
|
||||
|
||||
except CancelledError as exc:
|
||||
raise exc
|
||||
except CatchableError as exc:
|
||||
return nil
|
||||
finally:
|
||||
if p.dialLock.locked:
|
||||
p.dialLock.release()
|
||||
|
||||
proc send*(
|
||||
p: PubSubPeer,
|
||||
msg: RPCMsg,
|
||||
timeout: Duration = DefaultSendTimeout) {.async.} =
|
||||
proc connectImpl*(p: PubSubPeer) {.async.} =
|
||||
try:
|
||||
discard await getSendConn(p)
|
||||
except CatchableError as exc:
|
||||
debug "Could not connect to pubsub peer", err = exc.msg
|
||||
|
||||
proc connect*(p: PubSubPeer) =
|
||||
asyncCheck(connectImpl(p))
|
||||
|
||||
proc sendImpl(p: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
doAssert(not isNil(p), "pubsubpeer nil!")
|
||||
|
||||
logScope:
|
||||
|
|
@ -217,16 +234,15 @@ proc send*(
|
|||
libp2p_pubsub_skipped_sent_messages.inc(labelValues = [p.id])
|
||||
return
|
||||
|
||||
var conn: Connection
|
||||
var conn = await p.getSendConn()
|
||||
try:
|
||||
trace "about to send message"
|
||||
conn = await p.getSendConn()
|
||||
|
||||
if conn == nil:
|
||||
debug "Couldn't get send connection, dropping message"
|
||||
return
|
||||
|
||||
trace "sending encoded msgs to peer", connId = $conn.oid
|
||||
await conn.writeLp(encoded).wait(timeout)
|
||||
await conn.writeLp(encoded)
|
||||
|
||||
p.sentRpcCache.put(digest)
|
||||
trace "sent pubsub message to remote", connId = $conn.oid
|
||||
|
|
@ -238,22 +254,32 @@ proc send*(
|
|||
libp2p_pubsub_sent_messages.inc(labelValues = [p.id, t])
|
||||
|
||||
except CatchableError as exc:
|
||||
# Because we detach the send call from the currently executing task using
|
||||
# asyncCheck, no exceptions may leak out of it
|
||||
trace "unable to send to remote", exc = exc.msg
|
||||
# Next time sendConn is used, it will be have its close flag set and thus
|
||||
# will be recycled
|
||||
if not isNil(conn):
|
||||
await conn.close()
|
||||
await conn.close() # This will clean up the send connection
|
||||
|
||||
raise exc
|
||||
if exc is CancelledError: # TODO not handled
|
||||
debug "Send cancelled"
|
||||
|
||||
# We'll ask for a new send connection whenever possible
|
||||
if p.sendConn == conn:
|
||||
p.sendConn = nil
|
||||
|
||||
proc send*(p: PubSubPeer, msg: RPCMsg) =
|
||||
asyncCheck sendImpl(p, msg)
|
||||
|
||||
proc `$`*(p: PubSubPeer): string =
|
||||
p.id
|
||||
$p.peerId
|
||||
|
||||
proc newPubSubPeer*(peerId: PeerID,
|
||||
switch: Switch,
|
||||
getConn: GetConn,
|
||||
codec: string): PubSubPeer =
|
||||
new result
|
||||
result.switch = switch
|
||||
result.getConn = getConn
|
||||
result.codec = codec
|
||||
result.peerId = peerId
|
||||
result.sentRpcCache = newTimedCache[string](2.minutes)
|
||||
|
|
|
|||
|
|
@ -50,6 +50,11 @@ type
|
|||
messages*: seq[Message]
|
||||
control*: Option[ControlMessage]
|
||||
|
||||
func withSubs*(
|
||||
T: type RPCMsg, topics: openArray[string], subscribe: bool): T =
|
||||
T(
|
||||
subscriptions: topics.mapIt(SubOpts(subscribe: subscribe, topic: it)))
|
||||
|
||||
func shortLog*(s: ControlIHave): auto =
|
||||
(
|
||||
topicID: s.topicID.shortLog,
|
||||
|
|
|
|||
|
|
@ -43,7 +43,7 @@ logScope:
|
|||
topics = "bufferstream"
|
||||
|
||||
const
|
||||
DefaultBufferSize* = 102400
|
||||
DefaultBufferSize* = 128
|
||||
|
||||
const
|
||||
BufferStreamTrackerName* = "libp2p.bufferstream"
|
||||
|
|
|
|||
|
|
@ -16,6 +16,13 @@ type
|
|||
|
||||
proc noop(data: seq[byte]) {.async, gcsafe.} = discard
|
||||
|
||||
proc getPubSubPeer(p: TestGossipSub, peerId: PeerID): auto =
|
||||
proc getConn(): Future[(Connection, RPCMsg)] {.async.} =
|
||||
let conn = await p.switch.dial(peerId, GossipSubCodec)
|
||||
return (conn, RPCMsg.withSubs(toSeq(p.topics.keys), true))
|
||||
|
||||
newPubSubPeer(peerId, getConn, GossipSubCodec)
|
||||
|
||||
proc randomPeerInfo(): PeerInfo =
|
||||
PeerInfo.init(PrivateKey.random(ECDSA, rng[]).get())
|
||||
|
||||
|
|
@ -39,7 +46,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipSub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
gossipSub.peers[peerInfo.peerId] = peer
|
||||
gossipSub.mesh[topic].incl(peer)
|
||||
|
||||
|
|
@ -69,7 +76,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = PeerInfo.init(PrivateKey.random(ECDSA, rng[]).get())
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
gossipSub.peers[peerInfo.peerId] = peer
|
||||
gossipSub.mesh[topic].incl(peer)
|
||||
|
||||
|
|
@ -89,7 +96,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic = "foobar"
|
||||
|
|
@ -101,7 +108,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
var peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
gossipSub.gossipsub[topic].incl(peer)
|
||||
|
||||
|
|
@ -121,7 +128,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic = "foobar"
|
||||
|
|
@ -135,7 +142,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = PeerInfo.init(PrivateKey.random(ECDSA, rng[]).get())
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
gossipSub.fanout[topic].incl(peer)
|
||||
|
||||
|
|
@ -156,7 +163,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic1 = "foobar1"
|
||||
|
|
@ -173,7 +180,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
gossipSub.fanout[topic1].incl(peer)
|
||||
gossipSub.fanout[topic2].incl(peer)
|
||||
|
|
@ -197,7 +204,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic = "foobar"
|
||||
|
|
@ -212,7 +219,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
if i mod 2 == 0:
|
||||
gossipSub.fanout[topic].incl(peer)
|
||||
|
|
@ -225,7 +232,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
gossipSub.gossipsub[topic].incl(peer)
|
||||
|
||||
|
|
@ -262,7 +269,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic = "foobar"
|
||||
|
|
@ -274,7 +281,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipsub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
if i mod 2 == 0:
|
||||
gossipSub.fanout[topic].incl(peer)
|
||||
|
|
@ -307,7 +314,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic = "foobar"
|
||||
|
|
@ -319,7 +326,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipSub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
if i mod 2 == 0:
|
||||
gossipSub.mesh[topic].incl(peer)
|
||||
|
|
@ -352,7 +359,7 @@ suite "GossipSub internal":
|
|||
proc testRun(): Future[bool] {.async.} =
|
||||
let gossipSub = TestGossipSub.init(newStandardSwitch())
|
||||
|
||||
proc handler(peer: PubSubPeer, msg: seq[RPCMsg]) {.async.} =
|
||||
proc handler(peer: PubSubPeer, msg: RPCMsg) {.async.} =
|
||||
discard
|
||||
|
||||
let topic = "foobar"
|
||||
|
|
@ -364,7 +371,7 @@ suite "GossipSub internal":
|
|||
conns &= conn
|
||||
let peerInfo = randomPeerInfo()
|
||||
conn.peerInfo = peerInfo
|
||||
let peer = newPubSubPeer(peerInfo.peerId, gossipSub.switch, GossipSubCodec)
|
||||
let peer = gossipSub.getPubSubPeer(peerInfo.peerId)
|
||||
peer.handler = handler
|
||||
if i mod 2 == 0:
|
||||
gossipSub.mesh[topic].incl(peer)
|
||||
|
|
|
|||
Loading…
Reference in New Issue