gossipsub: unsubscribe fixes (#569)
* gossipsub: unsubscribe fixes * fix KeyError when updating metric of unsubscribed topic * fix unsubscribe message not being sent to all peers causing them to keep thinking we're still subscribed * release memory earlier in a few places * floodsub fix
This commit is contained in:
Jacek Sieka
GitHub
parent
9f301964ed
commit
83a20a992a
|
|
@ -39,10 +39,10 @@ proc addSeen*(f: FloodSub, msgId: MessageID): bool =
|
|||
# Return true if the message has already been seen
|
||||
f.seen.put(f.seenSalt & msgId)
|
||||
|
||||
method subscribeTopic*(f: FloodSub,
|
||||
proc handleSubscribe*(f: FloodSub,
|
||||
peer: PubsubPeer,
|
||||
topic: string,
|
||||
subscribe: bool,
|
||||
peer: PubsubPeer) {.gcsafe.} =
|
||||
subscribe: bool) =
|
||||
logScope:
|
||||
peer
|
||||
topic
|
||||
|
|
@ -61,21 +61,16 @@ method subscribeTopic*(f: FloodSub,
|
|||
return
|
||||
|
||||
if subscribe:
|
||||
if topic notin f.floodsub:
|
||||
f.floodsub[topic] = initHashSet[PubSubPeer]()
|
||||
|
||||
trace "adding subscription for topic", peer, topic
|
||||
|
||||
# subscribe the peer to the topic
|
||||
f.floodsub[topic].incl(peer)
|
||||
f.floodsub.mgetOrPut(topic, HashSet[PubSubPeer]()).incl(peer)
|
||||
else:
|
||||
if topic notin f.floodsub:
|
||||
return
|
||||
|
||||
f.floodsub.withValue(topic, peers):
|
||||
trace "removing subscription for topic", peer, topic
|
||||
|
||||
# unsubscribe the peer from the topic
|
||||
f.floodsub[topic].excl(peer)
|
||||
peers[].excl(peer)
|
||||
|
||||
method unsubscribePeer*(f: FloodSub, peer: PeerID) =
|
||||
## handle peer disconnects
|
||||
|
|
@ -93,7 +88,9 @@ method unsubscribePeer*(f: FloodSub, peer: PeerID) =
|
|||
method rpcHandler*(f: FloodSub,
|
||||
peer: PubSubPeer,
|
||||
rpcMsg: RPCMsg) {.async.} =
|
||||
await procCall PubSub(f).rpcHandler(peer, rpcMsg)
|
||||
for i in 0..<min(f.topicsHigh, rpcMsg.subscriptions.len):
|
||||
template sub: untyped = rpcMsg.subscriptions[i]
|
||||
f.handleSubscribe(peer, sub.topic, sub.subscribe)
|
||||
|
||||
for msg in rpcMsg.messages: # for every message
|
||||
let msgId = f.msgIdProvider(msg)
|
||||
|
|
@ -139,6 +136,8 @@ method rpcHandler*(f: FloodSub,
|
|||
f.broadcast(toSendPeers, RPCMsg(messages: @[msg]))
|
||||
trace "Forwared message to peers", peers = toSendPeers.len
|
||||
|
||||
f.updateMetrics(rpcMsg)
|
||||
|
||||
method init*(f: FloodSub) =
|
||||
proc handler(conn: Connection, proto: string) {.async.} =
|
||||
## main protocol handler that gets triggered on every
|
||||
|
|
@ -202,19 +201,6 @@ method publish*(f: FloodSub,
|
|||
|
||||
return peers.len
|
||||
|
||||
method unsubscribe*(f: FloodSub,
|
||||
topics: seq[TopicPair]) =
|
||||
procCall PubSub(f).unsubscribe(topics)
|
||||
|
||||
for p in f.peers.values:
|
||||
f.sendSubs(p, topics.mapIt(it.topic).deduplicate(), false)
|
||||
|
||||
method unsubscribeAll*(f: FloodSub, topic: string) =
|
||||
procCall PubSub(f).unsubscribeAll(topic)
|
||||
|
||||
for p in f.peers.values:
|
||||
f.sendSubs(p, @[topic], false)
|
||||
|
||||
method initPubSub*(f: FloodSub) =
|
||||
procCall PubSub(f).initPubSub()
|
||||
f.seen = TimedCache[MessageID].init(2.minutes)
|
||||
|
|
|
|||
|
|
@ -200,29 +200,29 @@ method unsubscribePeer*(g: GossipSub, peer: PeerID) =
|
|||
|
||||
procCall FloodSub(g).unsubscribePeer(peer)
|
||||
|
||||
method subscribeTopic*(g: GossipSub,
|
||||
proc handleSubscribe*(g: GossipSub,
|
||||
peer: PubSubPeer,
|
||||
topic: string,
|
||||
subscribe: bool,
|
||||
peer: PubSubPeer) {.gcsafe.} =
|
||||
subscribe: bool) =
|
||||
logScope:
|
||||
peer
|
||||
topic
|
||||
|
||||
if subscribe:
|
||||
# this is a workaround for a race condition
|
||||
# that can happen if we disconnect the peer very early
|
||||
# in the future we might use this as a test case
|
||||
# and eventually remove this workaround
|
||||
if subscribe and peer.peerId notin g.peers:
|
||||
if peer.peerId notin g.peers:
|
||||
trace "ignoring unknown peer"
|
||||
return
|
||||
|
||||
if subscribe and not(isNil(g.subscriptionValidator)) and not(g.subscriptionValidator(topic)):
|
||||
if not(isNil(g.subscriptionValidator)) and not(g.subscriptionValidator(topic)):
|
||||
# this is a violation, so warn should be in order
|
||||
trace "ignoring invalid topic subscription", topic, peer
|
||||
libp2p_gossipsub_invalid_topic_subscription.inc()
|
||||
return
|
||||
|
||||
if subscribe:
|
||||
trace "peer subscribed to topic"
|
||||
|
||||
# subscribe remote peer to the topic
|
||||
|
|
@ -241,9 +241,7 @@ method subscribeTopic*(g: GossipSub,
|
|||
|
||||
trace "gossip peers", peers = g.gossipsub.peers(topic), topic
|
||||
|
||||
proc handleControl(g: GossipSub, peer: PubSubPeer, rpcMsg: RPCMsg) =
|
||||
if rpcMsg.control.isSome:
|
||||
let control = rpcMsg.control.get()
|
||||
proc handleControl(g: GossipSub, peer: PubSubPeer, control: ControlMessage) =
|
||||
g.handlePrune(peer, control.prune)
|
||||
|
||||
var respControl: ControlMessage
|
||||
|
|
@ -282,9 +280,9 @@ proc handleControl(g: GossipSub, peer: PubSubPeer, rpcMsg: RPCMsg) =
|
|||
method rpcHandler*(g: GossipSub,
|
||||
peer: PubSubPeer,
|
||||
rpcMsg: RPCMsg) {.async.} =
|
||||
# base will check the amount of subscriptions and process subscriptions
|
||||
# also will update some metrics
|
||||
await procCall PubSub(g).rpcHandler(peer, rpcMsg)
|
||||
for i in 0..<min(g.topicsHigh, rpcMsg.subscriptions.len):
|
||||
template sub: untyped = rpcMsg.subscriptions[i]
|
||||
g.handleSubscribe(peer, sub.topic, sub.subscribe)
|
||||
|
||||
# the above call applied limtis to subs number
|
||||
# in gossipsub we want to apply scoring as well
|
||||
|
|
@ -294,7 +292,8 @@ method rpcHandler*(g: GossipSub,
|
|||
limit = g.topicsHigh
|
||||
peer.behaviourPenalty += 0.1
|
||||
|
||||
for msg in rpcMsg.messages: # for every message
|
||||
for i in 0..<rpcMsg.messages.len(): # for every message
|
||||
template msg: untyped = rpcMsg.messages[i]
|
||||
let msgId = g.msgIdProvider(msg)
|
||||
|
||||
# avoid the remote peer from controlling the seen table hashing
|
||||
|
|
@ -371,12 +370,14 @@ method rpcHandler*(g: GossipSub,
|
|||
else:
|
||||
libp2p_pubsub_messages_rebroadcasted.inc(toSendPeers.len.int64, labelValues = ["generic"])
|
||||
|
||||
g.handleControl(peer, rpcMsg)
|
||||
if rpcMsg.control.isSome():
|
||||
g.handleControl(peer, rpcMsg.control.unsafeGet())
|
||||
|
||||
method subscribe*(g: GossipSub,
|
||||
topic: string,
|
||||
handler: TopicHandler) =
|
||||
procCall PubSub(g).subscribe(topic, handler)
|
||||
g.updateMetrics(rpcMsg)
|
||||
|
||||
method onTopicSubscription*(g: GossipSub, topic: string, subscribed: bool) =
|
||||
if subscribed:
|
||||
procCall PubSub(g).onTopicSubscription(topic, subscribed)
|
||||
|
||||
# if we have a fanout on this topic break it
|
||||
if topic in g.fanout:
|
||||
|
|
@ -384,53 +385,26 @@ method subscribe*(g: GossipSub,
|
|||
|
||||
# rebalance but don't update metrics here, we do that only in the heartbeat
|
||||
g.rebalanceMesh(topic, metrics = nil)
|
||||
|
||||
proc unsubscribe*(g: GossipSub, topic: string) =
|
||||
var
|
||||
msg = RPCMsg.withSubs(@[topic], subscribe = false)
|
||||
gpeers = g.gossipsub.getOrDefault(topic)
|
||||
|
||||
if topic in g.mesh:
|
||||
else:
|
||||
let mpeers = g.mesh.getOrDefault(topic)
|
||||
|
||||
# remove mesh peers from gpeers, we send 2 different messages
|
||||
gpeers = gpeers - mpeers
|
||||
# send to peers NOT in mesh first
|
||||
g.broadcast(gpeers, msg)
|
||||
# Remove peers from the mesh since we're no longer both interested
|
||||
# in the topic
|
||||
let msg = RPCMsg(control: some(ControlMessage(
|
||||
prune: @[ControlPrune(
|
||||
topicID: topic,
|
||||
peers: g.peerExchangeList(topic),
|
||||
backoff: g.parameters.pruneBackoff.seconds.uint64)])))
|
||||
g.broadcast(mpeers, msg)
|
||||
|
||||
for peer in mpeers:
|
||||
trace "pruning unsubscribeAll call peer", peer, score = peer.score
|
||||
g.pruned(peer, topic)
|
||||
|
||||
g.mesh.del(topic)
|
||||
|
||||
msg.control =
|
||||
some(ControlMessage(prune:
|
||||
@[ControlPrune(topicID: topic,
|
||||
peers: g.peerExchangeList(topic),
|
||||
backoff: g.parameters.pruneBackoff.seconds.uint64)]))
|
||||
|
||||
# send to peers IN mesh now
|
||||
g.broadcast(mpeers, msg)
|
||||
else:
|
||||
g.broadcast(gpeers, msg)
|
||||
|
||||
g.topicParams.del(topic)
|
||||
|
||||
method unsubscribeAll*(g: GossipSub, topic: string) =
|
||||
g.unsubscribe(topic)
|
||||
# finally let's remove from g.topics, do that by calling PubSub
|
||||
procCall PubSub(g).unsubscribeAll(topic)
|
||||
|
||||
method unsubscribe*(g: GossipSub,
|
||||
topics: seq[TopicPair]) =
|
||||
procCall PubSub(g).unsubscribe(topics)
|
||||
|
||||
for (topic, handler) in topics:
|
||||
# delete from mesh only if no handlers are left
|
||||
# (handlers are removed in pubsub unsubscribe above)
|
||||
if topic notin g.topics:
|
||||
g.unsubscribe(topic)
|
||||
# Send unsubscribe (in reverse order to sub/graft)
|
||||
procCall PubSub(g).onTopicSubscription(topic, subscribed)
|
||||
|
||||
method publish*(g: GossipSub,
|
||||
topic: string,
|
||||
|
|
|
|||
|
|
@ -69,13 +69,13 @@ declarePublicCounter(libp2p_pubsub_received_prune, "pubsub broadcast prune", lab
|
|||
|
||||
type
|
||||
TopicHandler* = proc(topic: string,
|
||||
data: seq[byte]): Future[void] {.gcsafe.}
|
||||
data: seq[byte]): Future[void] {.gcsafe, raises: [Defect].}
|
||||
|
||||
ValidationResult* {.pure.} = enum
|
||||
Accept, Reject, Ignore
|
||||
|
||||
ValidatorHandler* = proc(topic: string,
|
||||
message: Message): Future[ValidationResult] {.gcsafe.}
|
||||
message: Message): Future[ValidationResult] {.gcsafe, raises: [Defect].}
|
||||
|
||||
TopicPair* = tuple[topic: string, handler: TopicHandler]
|
||||
|
||||
|
|
@ -85,15 +85,10 @@ type
|
|||
SubscriptionValidator* =
|
||||
proc(topic: string): bool {.raises: [Defect], gcsafe.}
|
||||
|
||||
Topic* = object
|
||||
# make this a variant type if one day we have different Params structs
|
||||
name*: string
|
||||
handler*: seq[TopicHandler]
|
||||
|
||||
PubSub* = ref object of LPProtocol
|
||||
switch*: Switch # the switch used to dial/connect to peers
|
||||
peerInfo*: PeerInfo # this peer's info
|
||||
topics*: Table[string, Topic] # local topics
|
||||
topics*: Table[string, seq[TopicHandler]] # the topics that _we_ are interested in
|
||||
peers*: Table[PeerID, PubSubPeer] ##\
|
||||
## Peers that we are interested to gossip with (but not necessarily
|
||||
## yet connected to)
|
||||
|
|
@ -106,7 +101,7 @@ type
|
|||
msgSeqno*: uint64
|
||||
anonymize*: bool # if we omit fromPeer and seqno from RPC messages we send
|
||||
subscriptionValidator*: SubscriptionValidator # callback used to validate subscriptions
|
||||
topicsHigh*: int # the maximum number of topics we allow in a subscription message (application specific, defaults to int max)
|
||||
topicsHigh*: int # the maximum number of topics a peer is allowed to subscribe to
|
||||
|
||||
knownTopics*: HashSet[string]
|
||||
|
||||
|
|
@ -186,10 +181,11 @@ proc broadcast*(
|
|||
|
||||
proc sendSubs*(p: PubSub,
|
||||
peer: PubSubPeer,
|
||||
topics: seq[string],
|
||||
topics: openArray[string],
|
||||
subscribe: bool) =
|
||||
## send subscriptions to remote peer
|
||||
p.send(peer, RPCMsg.withSubs(topics, subscribe))
|
||||
|
||||
for topic in topics:
|
||||
if subscribe:
|
||||
if p.knownTopics.contains(topic):
|
||||
|
|
@ -202,26 +198,9 @@ proc sendSubs*(p: PubSub,
|
|||
else:
|
||||
libp2p_pubsub_broadcast_unsubscriptions.inc(labelValues = ["generic"])
|
||||
|
||||
method subscribeTopic*(p: PubSub,
|
||||
topic: string,
|
||||
subscribe: bool,
|
||||
peer: PubSubPeer) {.base.} =
|
||||
# both gossipsub and floodsub diverge, and this super call is not necessary right now
|
||||
# if necessary remove the assertion
|
||||
doAssert(false, "unexpected call to pubsub.subscribeTopic")
|
||||
|
||||
method rpcHandler*(p: PubSub,
|
||||
peer: PubSubPeer,
|
||||
rpcMsg: RPCMsg): Future[void] {.base.} =
|
||||
## handle rpc messages
|
||||
trace "processing RPC message", msg = rpcMsg.shortLog, peer
|
||||
proc updateMetrics*(p: PubSub, rpcMsg: RPCMsg) =
|
||||
for i in 0..<min(rpcMsg.subscriptions.len, p.topicsHigh):
|
||||
let s = rpcMsg.subscriptions[i]
|
||||
trace "about to subscribe to topic", topicId = s.topic, peer, subscribe = s.subscribe
|
||||
p.subscribeTopic(s.topic, s.subscribe, peer)
|
||||
|
||||
for i in 0..<min(rpcMsg.subscriptions.len, p.topicsHigh):
|
||||
let sub = rpcMsg.subscriptions[i]
|
||||
template sub(): untyped = rpcMsg.subscriptions[i]
|
||||
if sub.subscribe:
|
||||
if p.knownTopics.contains(sub.topic):
|
||||
libp2p_pubsub_received_subscriptions.inc(labelValues = [sub.topic])
|
||||
|
|
@ -233,8 +212,10 @@ method rpcHandler*(p: PubSub,
|
|||
else:
|
||||
libp2p_pubsub_received_unsubscriptions.inc(labelValues = ["generic"])
|
||||
|
||||
for smsg in rpcMsg.messages:
|
||||
for topic in smsg.topicIDs:
|
||||
for i in 0..<rpcMsg.messages.len():
|
||||
template smsg: untyped = rpcMsg.messages[i]
|
||||
for j in 0..<smsg.topicIDs.len():
|
||||
template topic: untyped = smsg.topicIDs[j]
|
||||
if p.knownTopics.contains(topic):
|
||||
libp2p_pubsub_received_messages.inc(labelValues = [topic])
|
||||
else:
|
||||
|
|
@ -242,8 +223,7 @@ method rpcHandler*(p: PubSub,
|
|||
|
||||
if rpcMsg.control.isSome():
|
||||
libp2p_pubsub_received_iwant.inc(rpcMsg.control.get().iwant.len.int64)
|
||||
|
||||
let control = rpcMsg.control.get()
|
||||
template control: untyped = rpcMsg.control.unsafeGet()
|
||||
for ihave in control.ihave:
|
||||
if p.knownTopics.contains(ihave.topicID):
|
||||
libp2p_pubsub_received_ihave.inc(labelValues = [ihave.topicID])
|
||||
|
|
@ -260,11 +240,11 @@ method rpcHandler*(p: PubSub,
|
|||
else:
|
||||
libp2p_pubsub_received_prune.inc(labelValues = ["generic"])
|
||||
|
||||
# Avoid async transformation to avoid copying of rpcMsg into closure - this
|
||||
# is an unnecessary hotspot in gossip
|
||||
var res = newFuture[void]("PubSub.rpcHandler")
|
||||
res.complete()
|
||||
return res
|
||||
method rpcHandler*(p: PubSub,
|
||||
peer: PubSubPeer,
|
||||
rpcMsg: RPCMsg): Future[void] {.base.} =
|
||||
## Handler that must be overridden by concrete implementation
|
||||
raiseAssert "Unimplemented"
|
||||
|
||||
method onNewPeer(p: PubSub, peer: PubSubPeer) {.base.} = discard
|
||||
|
||||
|
|
@ -279,13 +259,13 @@ method onPubSubPeerEvent*(p: PubSub, peer: PubsubPeer, event: PubsubPeerEvent) {
|
|||
|
||||
proc getOrCreatePeer*(
|
||||
p: PubSub,
|
||||
peer: PeerID,
|
||||
peerId: PeerID,
|
||||
protos: seq[string]): PubSubPeer =
|
||||
if peer in p.peers:
|
||||
return p.peers[peer]
|
||||
p.peers.withValue(peerId, peer):
|
||||
return peer[]
|
||||
|
||||
proc getConn(): Future[Connection] =
|
||||
p.switch.dial(peer, protos)
|
||||
p.switch.dial(peerId, protos)
|
||||
|
||||
proc dropConn(peer: PubSubPeer) =
|
||||
proc dropConnAsync(peer: PubsubPeer) {.async.} =
|
||||
|
|
@ -299,10 +279,10 @@ proc getOrCreatePeer*(
|
|||
p.onPubSubPeerEvent(peer, event)
|
||||
|
||||
# create new pubsub peer
|
||||
let pubSubPeer = newPubSubPeer(peer, getConn, dropConn, onEvent, protos[0])
|
||||
debug "created new pubsub peer", peer
|
||||
let pubSubPeer = newPubSubPeer(peerId, getConn, dropConn, onEvent, protos[0])
|
||||
debug "created new pubsub peer", peerId
|
||||
|
||||
p.peers[peer] = pubSubPeer
|
||||
p.peers[peerId] = pubSubPeer
|
||||
pubSubPeer.observers = p.observers
|
||||
|
||||
onNewPeer(p, pubSubPeer)
|
||||
|
|
@ -314,13 +294,21 @@ proc getOrCreatePeer*(
|
|||
|
||||
return pubSubPeer
|
||||
|
||||
proc handleData*(p: PubSub, topic: string, data: seq[byte]): Future[void] {.async.} =
|
||||
if topic notin p.topics: return # Not subscribed
|
||||
proc handleData*(p: PubSub, topic: string, data: seq[byte]): Future[void] =
|
||||
# Start work on all data handlers without copying data into closure like
|
||||
# happens on {.async.} transformation
|
||||
p.topics.withValue(topic, handlers) do:
|
||||
var futs = newSeq[Future[void]]()
|
||||
|
||||
# gather all futures without yielding to scheduler
|
||||
var futs = p.topics[topic].handler.mapIt(it(topic, data))
|
||||
if futs.len() == 0: return # No handlers
|
||||
for handler in handlers[]:
|
||||
if handler != nil: # allow nil handlers
|
||||
let fut = handler(topic, data)
|
||||
if not fut.completed(): # Fast path for successful sync handlers
|
||||
futs.add(fut)
|
||||
|
||||
if futs.len() > 0:
|
||||
proc waiter(): Future[void] {.async.} =
|
||||
# slow path - we have to wait for the handlers to complete
|
||||
try:
|
||||
futs = await allFinished(futs)
|
||||
except CancelledError:
|
||||
|
|
@ -334,6 +322,12 @@ proc handleData*(p: PubSub, topic: string, data: seq[byte]): Future[void] {.asyn
|
|||
if fut.failed:
|
||||
let err = fut.readError()
|
||||
warn "Error in topic handler", msg = err.msg
|
||||
return waiter()
|
||||
|
||||
# Fast path - futures finished synchronously or nobody cared about data
|
||||
var res = newFuture[void]()
|
||||
res.complete()
|
||||
return res
|
||||
|
||||
method handleConn*(p: PubSub,
|
||||
conn: Connection,
|
||||
|
|
@ -381,32 +375,30 @@ method subscribePeer*(p: PubSub, peer: PeerID) {.base.} =
|
|||
proc updateTopicMetrics(p: PubSub, topic: string) =
|
||||
# metrics
|
||||
libp2p_pubsub_topics.set(p.topics.len.int64)
|
||||
|
||||
if p.knownTopics.contains(topic):
|
||||
libp2p_pubsub_topic_handlers.set(p.topics[topic].handler.len.int64, labelValues = [topic])
|
||||
p.topics.withValue(topic, handlers) do:
|
||||
libp2p_pubsub_topic_handlers.set(handlers[].len.int64, labelValues = [topic])
|
||||
do:
|
||||
libp2p_pubsub_topic_handlers.set(0, labelValues = [topic])
|
||||
else:
|
||||
libp2p_pubsub_topic_handlers.set(0, labelValues = ["other"])
|
||||
var others: int64 = 0
|
||||
for key, val in p.topics:
|
||||
if not p.knownTopics.contains(key):
|
||||
libp2p_pubsub_topic_handlers.inc(val.handler.len.int64, labelValues = ["other"])
|
||||
if key notin p.knownTopics: others += 1
|
||||
|
||||
method unsubscribe*(p: PubSub,
|
||||
topics: seq[TopicPair]) {.base.} =
|
||||
## unsubscribe from a list of ``topic`` strings
|
||||
for t in topics:
|
||||
let
|
||||
handler = t.handler
|
||||
ttopic = t.topic
|
||||
closureScope:
|
||||
p.topics.withValue(ttopic, topic):
|
||||
topic[].handler.keepIf(proc (x: auto): bool = x != handler)
|
||||
libp2p_pubsub_topic_handlers.set(others, labelValues = ["other"])
|
||||
|
||||
if topic[].handler.len == 0:
|
||||
# make sure we delete the topic if
|
||||
# no more handlers are left
|
||||
p.topics.del(ttopic)
|
||||
method onTopicSubscription*(p: PubSub, topic: string, subscribed: bool) {.base.} =
|
||||
# Called when subscribe is called the first time for a topic or unsubscribe
|
||||
# removes the last handler
|
||||
|
||||
p.updateTopicMetrics(ttopic)
|
||||
# Notify others that we are no longer interested in the topic
|
||||
for _, peer in p.peers:
|
||||
p.sendSubs(peer, [topic], subscribed)
|
||||
|
||||
if subscribed:
|
||||
libp2p_pubsub_subscriptions.inc()
|
||||
else:
|
||||
libp2p_pubsub_unsubscriptions.inc()
|
||||
|
||||
proc unsubscribe*(p: PubSub,
|
||||
|
|
@ -414,21 +406,34 @@ proc unsubscribe*(p: PubSub,
|
|||
handler: TopicHandler) =
|
||||
## unsubscribe from a ``topic`` string
|
||||
##
|
||||
p.unsubscribe(@[(topic, handler)])
|
||||
p.topics.withValue(topic, handlers):
|
||||
handlers[].keepItIf(it != handler)
|
||||
|
||||
method unsubscribeAll*(p: PubSub, topic: string) {.base.} =
|
||||
if handlers[].len() == 0:
|
||||
p.topics.del(topic)
|
||||
|
||||
p.onTopicSubscription(topic, false)
|
||||
|
||||
p.updateTopicMetrics(topic)
|
||||
|
||||
proc unsubscribe*(p: PubSub, topics: openArray[TopicPair]) =
|
||||
## unsubscribe from a list of ``topic`` handlers
|
||||
for t in topics:
|
||||
p.unsubscribe(t.topic, t.handler)
|
||||
|
||||
proc unsubscribeAll*(p: PubSub, topic: string) =
|
||||
if topic notin p.topics:
|
||||
debug "unsubscribeAll called for an unknown topic", topic
|
||||
else:
|
||||
p.topics.del(topic)
|
||||
|
||||
p.onTopicSubscription(topic, false)
|
||||
|
||||
p.updateTopicMetrics(topic)
|
||||
|
||||
libp2p_pubsub_unsubscriptions.inc()
|
||||
|
||||
method subscribe*(p: PubSub,
|
||||
proc subscribe*(p: PubSub,
|
||||
topic: string,
|
||||
handler: TopicHandler) {.base.} =
|
||||
handler: TopicHandler) =
|
||||
## subscribe to a topic
|
||||
##
|
||||
## ``topic`` - a string topic to subscribe to
|
||||
|
|
@ -437,19 +442,19 @@ method subscribe*(p: PubSub,
|
|||
## that will be triggered
|
||||
## on every received message
|
||||
##
|
||||
if topic notin p.topics:
|
||||
|
||||
p.topics.withValue(topic, handlers) do:
|
||||
# Already subscribed, just adding another handler
|
||||
handlers[].add(handler)
|
||||
do:
|
||||
trace "subscribing to topic", name = topic
|
||||
p.topics[topic] = Topic(name: topic)
|
||||
p.topics[topic] = @[handler]
|
||||
|
||||
p.topics[topic].handler.add(handler)
|
||||
|
||||
for _, peer in p.peers:
|
||||
p.sendSubs(peer, @[topic], true)
|
||||
# Notify on first handler
|
||||
p.onTopicSubscription(topic, true)
|
||||
|
||||
p.updateTopicMetrics(topic)
|
||||
|
||||
libp2p_pubsub_subscriptions.inc()
|
||||
|
||||
method publish*(p: PubSub,
|
||||
topic: string,
|
||||
data: seq[byte]): Future[int] {.base, async.} =
|
||||
|
|
@ -481,18 +486,17 @@ method addValidator*(p: PubSub,
|
|||
topic: varargs[string],
|
||||
hook: ValidatorHandler) {.base.} =
|
||||
for t in topic:
|
||||
if t notin p.validators:
|
||||
p.validators[t] = initHashSet[ValidatorHandler]()
|
||||
|
||||
trace "adding validator for topic", topicId = t
|
||||
p.validators[t].incl(hook)
|
||||
p.validators.mgetOrPut(t, HashSet[ValidatorHandler]()).incl(hook)
|
||||
|
||||
method removeValidator*(p: PubSub,
|
||||
topic: varargs[string],
|
||||
hook: ValidatorHandler) {.base.} =
|
||||
for t in topic:
|
||||
if t in p.validators:
|
||||
p.validators[t].excl(hook)
|
||||
p.validators.withValue(t, validators):
|
||||
validators[].excl(hook)
|
||||
if validators[].len() == 0:
|
||||
p.validators.del(t)
|
||||
|
||||
method validate*(p: PubSub, message: Message): Future[ValidationResult] {.async, base.} =
|
||||
var pending: seq[Future[ValidationResult]]
|
||||
|
|
|
|||
|
|
@ -116,12 +116,14 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
|
|||
while not conn.atEof:
|
||||
trace "waiting for data", conn, peer = p, closed = conn.closed
|
||||
|
||||
let data = await conn.readLp(64 * 1024)
|
||||
var data = await conn.readLp(64 * 1024)
|
||||
trace "read data from peer",
|
||||
conn, peer = p, closed = conn.closed,
|
||||
data = data.shortLog
|
||||
|
||||
var rmsg = decodeRpcMsg(data)
|
||||
data = newSeq[byte]() # Release memory
|
||||
|
||||
if rmsg.isErr():
|
||||
notice "failed to decode msg from peer",
|
||||
conn, peer = p, closed = conn.closed,
|
||||
|
|
@ -204,10 +206,13 @@ proc connectImpl(p: PubSubPeer) {.async.} =
|
|||
proc connect*(p: PubSubPeer) =
|
||||
asyncSpawn connectImpl(p)
|
||||
|
||||
proc sendImpl(conn: Connection, encoded: seq[byte]) {.async.} =
|
||||
try:
|
||||
proc sendImpl(conn: Connection, encoded: seq[byte]): Future[void] {.raises: [Defect].} =
|
||||
trace "sending encoded msgs to peer", conn, encoded = shortLog(encoded)
|
||||
await conn.writeLp(encoded)
|
||||
|
||||
let fut = conn.writeLp(encoded) # Avoid copying `encoded` into future
|
||||
proc sendWaiter(): Future[void] {.async.} =
|
||||
try:
|
||||
await fut
|
||||
trace "sent pubsub message to remote", conn
|
||||
|
||||
except CatchableError as exc: # never cancelled
|
||||
|
|
@ -219,6 +224,8 @@ proc sendImpl(conn: Connection, encoded: seq[byte]) {.async.} =
|
|||
|
||||
await conn.close() # This will clean up the send connection
|
||||
|
||||
return sendWaiter()
|
||||
|
||||
template sendMetrics(msg: RPCMsg): untyped =
|
||||
when defined(libp2p_expensive_metrics):
|
||||
for x in msg.messages:
|
||||
|
|
@ -240,10 +247,7 @@ proc sendEncoded*(p: PubSubPeer, msg: seq[byte]) {.raises: [Defect].} =
|
|||
|
||||
# To limit the size of the closure, we only pass the encoded message and
|
||||
# connection to the spawned send task
|
||||
asyncSpawn(try:
|
||||
sendImpl(conn, msg)
|
||||
except Exception as exc: # TODO chronos Exception
|
||||
raiseAssert exc.msg)
|
||||
asyncSpawn sendImpl(conn, msg)
|
||||
|
||||
proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool) {.raises: [Defect].} =
|
||||
trace "sending msg to peer", peer = p, rpcMsg = shortLog(msg)
|
||||
|
|
|
|||
|
|
@ -236,7 +236,7 @@ proc readLp*(s: LPStream, maxSize: int): Future[seq[byte]] {.async, gcsafe.} =
|
|||
await s.readExactly(addr res[0], res.len)
|
||||
return res
|
||||
|
||||
method write*(s: LPStream, msg: seq[byte]): Future[void] {.base.} =
|
||||
method write*(s: LPStream, msg: seq[byte]): Future[void] {.base, raises: [Defect].} =
|
||||
doAssert(false, "not implemented!")
|
||||
|
||||
proc writeLp*(s: LPStream, msg: openArray[byte]): Future[void] =
|
||||
|
|
|
|||
|
|
@ -87,7 +87,7 @@ template rng*(): ref BrHmacDrbgContext =
|
|||
getRng()
|
||||
|
||||
type
|
||||
WriteHandler* = proc(data: seq[byte]): Future[void] {.gcsafe.}
|
||||
WriteHandler* = proc(data: seq[byte]): Future[void] {.gcsafe, raises: [Defect].}
|
||||
TestBufferStream* = ref object of BufferStream
|
||||
writeHandler*: WriteHandler
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue