Commit Graph

104 Commits

Author SHA1 Message Date
Johan T. Halseth
7d34ce9d08
lnwire+multi: define HasMaxHtlc helper on msgFlags 2019-01-22 08:42:30 +01:00
Valentine Wallace
207c4f030a
discovery/gossiper: include max HTLC when rebroadcasting stale channel updates
Co-authored-by: Johan T. Halseth <johanth@gmail.com>
2019-01-22 08:42:29 +01:00
Valentine Wallace
513ac23479
discovery/gossiper: persist remote channel policy updates' max htlc 2019-01-22 08:42:28 +01:00
Valentine Wallace
15168c391e
discovery+routing: validate msg flags and max htlc in ChannelUpdates
In this commit, we alter the ValidateChannelUpdateAnn function in
ann_validation to validate a remote ChannelUpdate's message flags
and max HTLC field. If the message flag is set but the max HTLC
field is not set or vice versa, the ChannelUpdate fails validation.

Co-authored-by: Johan T. Halseth <johanth@gmail.com>
2019-01-22 08:42:27 +01:00
Valentine Wallace
0fd6004958
multi: partition lnwire.ChanUpdateFlag into ChannelFlags and MessageFlags
In this commit:

* we partition lnwire.ChanUpdateFlag into two (ChanUpdateChanFlags and
ChanUpdateMsgFlags), from a uint16 to a pair of uint8's

* we rename the ChannelUpdate.Flags to ChannelFlags and add an
additional MessageFlags field, which will be used to indicate the
presence of the optional field HtlcMaximumMsat within the ChannelUpdate.

* we partition ChannelEdgePolicy.Flags into message and channel flags.
This change corresponds to the partitioning of the ChannelUpdate's Flags
field into MessageFlags and ChannelFlags.

Co-authored-by: Johan T. Halseth <johanth@gmail.com>
2019-01-22 08:42:26 +01:00
Johan T. Halseth
5dcd2a4530
gossiper: validate our own node announement 2018-12-05 09:31:25 +01:00
Olaoluwa Osuntokun
1fd3aac925
multi: switch from bolt packge to bbolt package for all imports 2018-11-29 20:33:49 -08:00
Wilmer Paulino
55094f1470
discovery/gossiper: send node anns when constructing full chan proof
In this commit, we allow the gossiper to also broadcast the
corresponding node announcements, if we know of them, of a channel when
constructing its full proof. We do this to ensure peers (other than our
remote peer) receive all the relevant announcements for a channel.

The tests changes were made to ensure the new behavior introduced works
as intended. Previously, the node announcements for each test channel
announcement were not processed, so they never existed from the
gossiper's point of view.

This also addresses an existing flake in the integration test
`testNodeAnnouncement`. This problem arose due to the node announcement
being sent before the connection between Dave (node announcement sender)
and Alice (node announcement receiver) was initiated and the full
channel proof was constructed.
2018-11-11 17:48:07 -08:00
Wilmer Paulino
c9e79527af
discovery/gossiper: add trace log when skipping unadvertised node ann 2018-11-11 17:48:06 -08:00
Conner Fromknecht
ef309f43d2
discovery: pass peer quit signal to ProcessQueryMsg
This commit passes the peer's quit signal to the
gossipSyncer when attempt to hand off gossip query
messages. This allows a rate-limited peer's read
handler to break out immediately, which would
otherwise remain stuck until the rate-limited
gossip syncer pulled the message.
2018-11-01 17:35:55 -07:00
Conner Fromknecht
96c47f7de4
discovery/gossiper: bypass main event loop for queries
This commit restructures the delivery of gossip
query related messages, such that they are delivered
directly to the gossip syncers. Gossip query rate
limiting was introduced in #1824 on a per-peer basis.
However, since all gossip query messages were being
delivered in the main event loop, the end result is
that one rate-limited peer could stall all other
peers.

In addition, since no other peers would be able to
submit gossip-related messages through the blocked
event loop, the back pressure would eventually rate
limit the read handlers of all peers as well.
The end result would be lengthy delays in reading
messages related to htlc forwarding.

The fix is to lift the delivery of gossip query
messages outside of the main event loop. With
this change, the rate limiting backpressure is
delivered only to the intended peer.
2018-11-01 17:28:20 -07:00
Wilmer Paulino
80196eb20f
discovery: ensure we only broadcast NodeAnnouncements of public nodes
In this commit, we modify the gossiper to no longer broadcast
NodeAnnouncements of nodes who intend to remain private. We do this to
prevent leaking their information to the greater network.
2018-10-24 17:28:55 -07:00
Olaoluwa Osuntokun
d67c1fdcaa
Merge pull request #1954 from Roasbeef/tor-node-ann-fixes
server: ensure each time we update a node ann we also update the on-disk version
2018-10-24 17:10:42 -07:00
Olaoluwa Osuntokun
eaa613f4f5
discovery+chan_series: replace usage of makeNodeAnn w/ new NodeAnnouncement method 2018-10-23 18:42:28 -07:00
sevastos
98275178c7 discovery/gossiper: fix logging on failed channel update 2018-10-22 15:37:38 +03:00
Olaoluwa Osuntokun
68774e3ae4
Merge pull request #1807 from wpaulino/retransmit-zero-stale-channels
discovery/gossiper: check ErrNoGraphEdgesFound for restransmitStaleChannels
2018-09-25 21:14:23 -07:00
Joost Jager
b5fd32ff77
discovery+routing: move validation logic to routing package
Previously, gossiper was the only object that validated channel
updates. Because updates can also be received as part of a
failed payment session in the routing package, validation logic
needs to be available there too. Gossiper already depends on
routing and having routing call the validation logic inside
gossiper would be a circular dependency. Therefore the validation
was moved to routing.
2018-09-11 20:12:07 +02:00
Conner Fromknecht
dc0030f11d
discovery/gossiper: remove go-errors pkg 2018-09-05 22:08:16 -07:00
Olaoluwa Osuntokun
d2a7d910b7
Merge pull request #1825 from Roasbeef/extra-gossip-message-data
channeldb+discovery: ensure we store, validate and propagate announcements with opaque data
2018-09-05 17:53:02 -07:00
Olaoluwa Osuntokun
841e24399c
discovery: ensure we populate ExtraOpaqueData when writing/reading from disk 2018-09-04 20:52:44 -07:00
Conner Fromknecht
8e94e55839
discovery/gossiper: require explict gossip syncer init
This commit removes the fallback in fetchGossipSyncer
that creates a gossip syncer if one is not registered
w/in the gossiper. Now that we register gossip syncers
explicitly before reading any gossip query messages,
this should not longer be required. The fallback also
did not honor the cfg.NoChanUpdates flag, which may
have led to inconsistencies between configuration and
actual behavior.
2018-09-04 17:32:25 -07:00
Wilmer Paulino
6f0fad7946
discovery/gossiper: check ErrNoGraphEdgesFound for
restransmitStaleChannels

In this commit, we add an additional error check for
ErrNoGraphEdgesFound when restransmitting stale channels during the
gossiper's startup. We do this to prevent benign log messages as we'll
log that we were unable to retransmit stale channels when we didn't have
any channels in our graph to begin with.
2018-09-04 16:22:06 -07:00
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