Commit Graph

82 Commits

Author SHA1 Message Date
Wilmer Paulino
a1b1b06b9e
discovery/gossiper: remove optimistic channel announcement request
In this commit, we aim to resolve an issue with nodes requesting for
channel announcements when receiving a channel update for a channel
they're not aware of. This can happen if a node is not caught up with
the chain or if they receive updates for zombie channels. This would
lead to a spam issue, as if a node is not caught up with the chain,
every new update they receive is premature, causing them to manually
request the backing channel announcement. Ideally, we should be able to
detect this as a potential DoS vector and ban the node responsible, but
for now we'll simply remove this functionality.
2018-08-27 15:54:21 -07:00
Olaoluwa Osuntokun
13a6d413ac
discovery: select on peer's QuitSignal to allow caller to unblock if disconnecting
In this commit, we select on the peer's QuitSignal to allow the caller
to unblock if the peer itself is disconnecting. With this change, we now
ensure that it isn't possible for a peer to block on this method and
prevent a graceful exit.
2018-08-25 17:30:16 -07:00
Johan T. Halseth
c56082006f
discovery/gossiper: formatting 2018-08-23 07:40:40 +02:00
Johan T. Halseth
0bc415c683
discovery/gossiper: don't return on errChan for ChannelUpdate not yet processed
Previosuly we would immediately return nil on the error channel for
premature ChannelUpdates, which would break the expection that a a
returned non-error meant the update was successfully added to the
database. This meant that the caller would believe the update was added
to the database, while it is actually still in volatile memory and can
be lost during restarts.

This change makes us handle premature ChannelUpdates as we handle other
premature announcements within the gossiper, by deferring sending on the
error channel until we have reprocessed the update.
2018-08-23 07:40:40 +02:00
Johan T. Halseth
7bbb2bbc80
discovery/gossiper: return on errChan on ValidationBarrier error 2018-08-23 07:40:40 +02:00
Johan T. Halseth
c8ce2aa2d2
discovery/gossiper: reaturn early of no premature to process 2018-08-23 07:40:39 +02:00
Johan T. Halseth
d0e8aeece1
discovery/gossiper: return on errChan in case of ChanAnn/Upd on wrong chain
Previously we wouldn't return anything in the case where the
announcement were meant for a chain we didn't recognize. After this
change we should return an error on the error channel in all flows
within the gossiper.
2018-08-23 07:40:39 +02:00
Johan T. Halseth
54f67f72b1
discovery/gossiper: define ErrGossiperShuttingDown 2018-08-23 07:40:39 +02:00
Valentine Wallace
1ffc3bb82e
multi: update to latest RegisterBlockEpochNtfn interface 2018-08-10 01:08:57 -07:00
Conner Fromknecht
cf2c371042
multi: fix linting errors 2018-08-02 18:20:50 -07:00
Olaoluwa Osuntokun
c41d1a0a44
Merge pull request #1596 from wpaulino/syncer-cfg-chunk-size
discovery/syncer: store chunk size within gossiperSyncerCfg
2018-07-31 20:55:10 -07:00
Conner Fromknecht
54c4b09f87
discovery/gossiper: copy bolt key to prevent panic
Corrects an instance that holds a reference to a boltdb
byte slice after returning from the transaction. This
can cause panics under certain conditions, which is
avoided by creating a copy of the key.
2018-07-30 18:30:19 -07:00
Wilmer Paulino
c61b037628 discovery/syncer: store chunk size within gossiperSyncerCfg
In this commit, we allow the gossiper syncer to store the chunk size for
its respective encoding type. We do this to prevent a race condition
that would arise within the unit tests by modifying the values of the
encodingTypeToChunkSize map to allow for easier testing.
2018-07-30 13:49:36 -07:00
Wilmer Paulino
6d4da72156
discovery/gossiper: update to latest NotifyWhenOnline changes 2018-07-19 12:34:08 -07:00
Olaoluwa Osuntokun
daf4a25fd9
discovery: fix missing formatting argument
Fixes #1576.
2018-07-17 16:43:06 -07:00
Olaoluwa Osuntokun
6f60f139f4 multi: switch over import paths from roasbeef/* to btcsuite/* 2018-07-13 17:05:39 -07:00
Wilmer Paulino
9ecfdb3c32
discovery/gossiper: hold ref to block epoch stream and cancel when stopped 2018-06-13 19:20:53 -07:00
Olaoluwa Osuntokun
1a15924d65
discovery: fix log for adding new gossip syncers
In this commit, we fix the logging when adding new gossip syncers. The
old log would log the byte array, rather than the byte slice. We fix
this by slicing before logging.
2018-06-11 22:58:30 -07:00
Conner Fromknecht
bf515a2341
discovery/gossiper: mostly deprecate SendToPeer
This commit changes the gossiper to direct messages to
peer objects, instead of sending them through the
server every time. The primary motivation is to reduce
contention on the server's mutex and, more importantly,
avoid deadlocks in the Triangle of Death.
2018-06-08 16:29:48 -07:00
maurycy
3be08e69cf multi: 64bit aligment of atomic vars on arm/x86-32 2018-06-04 20:02:34 -07:00
Olaoluwa Osuntokun
0ec4a06e6b
discovery: fix deadlock by ensure we don't hold sync mutex during send
In this commit, we fix an existing deadlock in the
gossiper->server->peer pipeline by ensuring that we're not holding the
syncer mutex while we attempt to have a syncer filter out the rest of
gossip messages.
2018-06-04 17:18:17 -07:00
Olaoluwa Osuntokun
b3ac3492a0
discovery: if unable to find gossipSyncer for peer, create one
In this commit we fix an existing bug caused by a scheduling race
condition. We'll now ensure that if we get a gossip message from a peer
before we create an instance for it, then we create one on the spot so
we can service the message. Before this commit, we would drop the first
message, and therefore never sync up with the peer at all, causing them
to miss channel announcements.
2018-05-31 17:54:45 -07:00
Olaoluwa Osuntokun
994d9cf7e4
discovery: attempt to request the full chan ann for stray chan updates
In this commit, we extend the AuthenticatedGossiper to take advantage of
the new query features in the case that it gets a channel update w/o
first receiving the full channel announcement. If this happens, we'll
attempt to find a syncer that's fully synced, and request the channel
announcement from it.
2018-05-31 16:31:01 -07:00
Olaoluwa Osuntokun
55dfc17c05
discovery: de-duplicate node announcements with legacy chan graph sync
Fixes #1072.
2018-05-31 16:30:58 -07:00
Olaoluwa Osuntokun
0016b3f458
discovery+lnd: create new chanSeries impl of the ChannelGraphTimeSeries interface
In this commit, we create a new concrete implementation for the new
discovery.ChannelGraphTimeSeries interface. We also export the
createChannelAnnouncement method to allow the chanSeries struct to
re-use the existing code for creating wire messages from the database
structs.
2018-05-31 16:30:55 -07:00
Olaoluwa Osuntokun
45bd544f11
discovery: update AuthenticatedGossiper to be aware of new gossipSyncers
In this commit, we update the logic in the AuthenticatedGossiper to
ensure that can properly create, manage, and dispatch messages to any
gossipSyncer instances created by the server.

With this set of changes, the gossip now has complete knowledge of the
current set of peers we're conneted to that support the new range
queries. Upon initial connect, InitSyncState will be called by the
server if the new peer understands the set of gossip queries. This will
then create a new spot in the peerSyncers map for the new syncer. For
each new gossip query message, we'll then attempt to dispatch the
message directly to the gossip syncer. When the peer has disconnected,
we then expect the server to call the PruneSyncState method which will
allow us to free up the resources.

Finally, when we go to broadcast messages, we'll send the messages
directly to the peers that have gossipSyncer instances active, so they
can properly be filtered out. For those that don't we'll broadcast
directly, ensuring we skip *all* peers that have an active gossip
syncer.
2018-05-31 16:30:53 -07:00
Olaoluwa Osuntokun
5789ef7c10
discovery: add new gossipSyncer struct to manage sync state for each peer
In this commit, introduce a new struct, the gossipSyncer. The role of
this struct is to encapsulate the state machine required to implement
the new gossip query range feature recently added to the spec. With this
change, each peer that knows of this new feature will have a new
goroutine that will be managed by the gossiper.

Once created and started, the gossipSyncer will start to progress
through each possible state, finally ending at the chansSynced stage. In
this stage, it has synchronized state with the remote peer, and is
simply awaiting any new messages from the gossiper to send directly to
the peer. Each message will only be sent if the remote peer actually has
a set update horizon, and the message isn't before or after that
horizon.

A set of unit tests has been added to ensure that two state machines
properly terminate and synchronize channel state.
2018-05-31 16:30:53 -07:00
Conner Fromknecht
3854c1ed68
discovery/gossiper: exit early on validation barrier quit 2018-05-08 16:32:08 -07:00
practicalswift
663c396235 multi: fix a-vs-an typos 2018-04-17 19:02:04 -07:00
Jim Posen
4b2cb68fe6 discovery: Fix formatting issue in log line. 2018-04-09 20:49:23 -07:00
Olaoluwa Osuntokun
3fa2e08665
test: update testUpdateChannelPolicy to ensure Bob's link uses the proper policies
In this commit, we update the testUpdateChannelPolicy to exercise the
recent set of changes within the switch. If one applies this test to a
fresh branch (without those new changes) it should fail. This is due to
the fact that before, Bob would attempt to apply the constraints of the
incoming link (which we updated) instead of the outgoing link. With the
recent set of changes, the test now properly passes.
2018-04-06 14:52:01 -07:00
Olaoluwa Osuntokun
9d4cea93f0
discovery: fix deadlock in processChanPolicyUpdate
In this commit, we fix an existing deadlock in the
processChanPolicyUpdate method. Before this commit, within
processChanPolicyUpdate, we would directly call updateChannel *within*
the ForEachChannel closure. This would at times result in a deadlock, as
updateChannel will itself attempt to create a write transaction in order
to persist the newly updated channel.

We fix this deadlock by simply performing another loop once we know the
set of channels that we wish to update. This second loop will actually
update the channels on disk.
2018-04-06 14:51:57 -07:00
Olaoluwa Osuntokun
2326d4afeb
discovery: bump rejected edges up to the trace logging level 2018-03-23 15:50:56 -07:00
Matt Drollette
1b7b35a8bc discovery: format log message with Errorf 2018-03-16 16:25:18 -07:00
Olaoluwa Osuntokun
800eea931f
build+multi: switch from bolt to bbolt
In this commit, we switch from boltbd/bolt to coreos/bbolt as the
former is no longer being actively maintained.
2018-03-10 19:01:13 -08:00
Olaoluwa Osuntokun
e7e4cdcf49
discovery: avoid always validating ECDSA sigs by asking router if item is fresh
In this commit, we reduce the amount of unnecessary work that the
gossiper can carry out. When CPU profiling some nodes, I noticed that
we’d spend a lot of time validating the signatures for an announcement,
only to realize that the router already had it.

To remedy this, we’ll use the new methods added to the channel router
in order to avoid unnecessarily validating an announcement that is
actually stale. This should reduce memory usage (since it uses big
int’s under the scenes), and also idle CPU usage.
2018-03-06 13:34:51 -05:00
practicalswift
b8e1351cf3 multi: fix some recently introduced typos 2018-02-18 15:27:29 -08:00
Olaoluwa Osuntokun
bf05e47780
discovery: add additional gossiper level reject cache
In this commit, we’ll add a new reject cache to ensure that we don’t
attempt to re-process any announcements already rejected by the
ChannelRouter.
2018-02-06 20:14:35 -08:00
Olaoluwa Osuntokun
cd9d2d7e6f
discovery: update graph API usage to match recent API changes 2018-02-06 20:14:32 -08:00
Daniel McNally
8543497dcc multi: fixing it's/its typos in comments 2018-02-06 19:13:07 -08:00
practicalswift
a93736d21e multi: comprehensive typo fixes across all packages 2018-02-06 19:11:11 -08:00
Olaoluwa Osuntokun
0a4de859a2
discovery+routing: reduce number of active validation barrier jobs
In order to reduce high CPU utilization during the initial network view
sync, we slash down the total number of active in-flight jobs that can
be launched.
2018-01-28 14:55:32 -08:00
Johan T. Halseth
a55c74f80c
discovery/gossiper: restrict database access per channel ID
This commit uses the multimutex.Mutex to esure database
state stays consistent when handling an announcement, by
restricting access to one goroutine per channel ID.

This fixes a bug where the goroutine would read the
database, make some decisions based on what was read,
then write its data to the database, but the read data
would be outdated at this point. For instance, an
AuthProof could have been added between reading the
database and when the decision whether to announce
the channel is made, making it not announce it.
Similarly, when receiving the AuthProof, the edge
policy could be added between reading the edge state
and adding the proof to the database, also resulting
in the edge not being announced.
2018-01-24 10:26:40 +01:00
Johan T. Halseth
3e01529de4
discovery/gossiper: don't reset batch after broadcast
This commit fixes a bug that could cause annoucements
to get lost, and resultet in flaky integration tests.
After a set of announcements was broadcastet, we would
reset (clear) the announcement batch, making any
annoucement that was added between the call to Emit()
and Reset() to be deleted, without ever being broadcast.

We can just remove the Reset() call, as the batch will
actually be reset within the call to Emit(), making
the previous call only delete those messages we hadn't
sent yet.
2018-01-24 10:26:39 +01:00
Olaoluwa Osuntokun
69e6ec9954
peer+funding: remove unneeded channel handoff code with the breach arbiter
We no longer need to hand off new channels that come online as the
chainWatcher will be persistent, and always have an active signal for
the entire lifetime of the channel.
2018-01-22 19:19:50 -08:00
Olaoluwa Osuntokun
8807d1d752
fundingmgr: add new function closure to send new channels to the ChainArbitrator 2018-01-22 19:19:38 -08:00
Olaoluwa Osuntokun
ebd97b83f3
discovery: ensure we only send node announcements that have active channels 2018-01-16 17:18:21 -08:00
Johan T. Halseth
483abbee5b
discovery: make sure ChannelUpdates always have incremented timestamp
This commit ensures that we always increment the timestamp of
ChannelUpdates we send telling the network about changes to
our channel policy. We do this because it could happen
(especially during tests) that we issued an update, but the
ChannelUpdate would have the same timestamp as our last
ChannelUpdate, and would be ignored by the network.
2018-01-12 22:57:03 +01:00
Johan T. Halseth
8370fa2cde
discovery/gossiper: apply TimeLockDelta to edge when processing policy update
Also rename various instances of "FeeUpdate" to "PolicyUpdate"
2018-01-12 22:56:32 +01:00
Johan T. Halseth
3f0a525331
discovery test: update gossiper test to account for timestamp deduping 2018-01-09 13:09:28 +01:00