Commit graph

30 commits

Author SHA1 Message Date
Roman Khimov
9eafec0d1d network: introduce peer-to-peer message queue
This one is designed to give more priority to direct nodes communication, that
is that their messaging would have more priority than generic broadcasts. It
should improve consensus process under TX pressure and allow to handle
pings in time (preventing disconnects).
2020-01-30 14:03:52 +03:00
Roman Khimov
1c28dd2567 network: add message type to disconnect error message
If it was caused by message processing, but only after the handshake to
preserve errIdenticalID and other handshaking errors.
2020-01-30 14:03:52 +03:00
Roman Khimov
06c3fbe455 network: rework ping sends, fix overpinging
Our node was too pingy because of wrong timer setups (that divided timeout
Duration by time.Second), it also was wrong in its time calculations (using
UTC time to calculate intervals). At the same time missing block is a
server-wide problem, so it's better solved with server-wide protocol loop.
2020-01-28 17:39:52 +03:00
Roman Khimov
99dfdc19e7 network: drop now useless addrReq queue from the server
Just broadcast a high-priority message to everyone.
2020-01-22 11:28:59 +03:00
Roman Khimov
34b863d645 network: introduce Server's MkMsg()
That wraps NewMessage() for a configured network.
2020-01-21 17:31:51 +03:00
Roman Khimov
1f672e0da7 network: move SendVersion() to the Peer
Only leave server-specific `getVersionMsg()` in the Server, all the other
logic is peer-related.
2020-01-21 17:26:08 +03:00
Roman Khimov
2c4ace022e network/config: redesign ping timeout handling a bit
1) Make timeout a timeout, don't do magic ping counts.
2) Drop additional timer from the main peer's protocol loop, create it
   dynamically and make it disconnect the peer.
3) Don't expose the ping counter to the outside, handle more logic inside the
   Peer.

Relates to #430.
2020-01-20 19:37:17 +03:00
Roman Khimov
62092c703d network: use local timestamp to decide when to ping
We don't and we won't have synchronized clocks in the network so the only
timestamp that we can compare our local time with is the one made
ourselves. What this ping mechanism is used for is to recover from missing the
block broadcast, thus it's appropriate for it to trigger after X seconds of
the local time since the last block received.

Relates to #430.
2020-01-20 19:37:17 +03:00
Roman Khimov
a8252ecc05 network: remove wrong ping condition
In reality it will never be true exactly in the case where we want this ping
mechanism to work --- when the node failed to get a block from the net. It
won't get the header either and thus its block height will be equal to header
height. The only moment when this condition is met is when the node does
initial synchronization and this synchronization works just fine without any
pings.

Relates to #430.
2020-01-20 19:37:17 +03:00
Roman Khimov
247cfa4165 network: either request blocks or ping a peer, but not both
It makes to sense to do both actions, pings are made for a different purpose.

Relates to #430.
2020-01-20 19:37:17 +03:00
Roman Khimov
0ba6b2a754 network: introduce peer sending queues
Two queues for high-priority and ordinary messages. Fixes #590. These queues
are deliberately made small to avoid buffer bloat problem, there is gonna be
another queueing layer above them to compensate for that. The queues are
designed to be synchronous in enqueueing, async capabilities are to be added
layer above later.
2020-01-20 17:23:26 +03:00
Roman Khimov
7f0882767c network: remove useless Done() method from the peer
It's internal state of the peer that no one should care about.
2020-01-20 17:23:26 +03:00
Roman Khimov
f39d5d5a10 network: fix unregistration on peer Disconnect
It should always signal to the server, not duplicating this send and not
missing it like it happened in the Server.run().
2020-01-20 17:23:26 +03:00
Roman Khimov
907a236285 network: move per-peer goroutines into the TCPPeer
As they're directly tied to it.
2020-01-20 17:23:26 +03:00
Vsevolod Brekelov
4e6ed9021c network: add ping pong processing
add pingInterval same as used in ref C# implementation with the same logic
add pingTimeout which is used to check whether pong received. If not -- drop the peer.
add pingLimit which is hardcoded to 4 in TCPPeer. It's limit for unsuccessful ping/pong calls (where pong wasn't received in pingTimeout interval)
2020-01-17 13:24:14 +03:00
Evgenii Stratonikov
e3098ed0f8 network: write messages atomically
Right now message can be written in several Write's so
concurrent calls of writeMsg() can in theory interleave.
This commit fixes it.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2019-11-18 09:31:00 +03:00
Roman Khimov
d7f747fa9a network: wait for both Version messages before ACKing
Otherwise the node might crash in `startProtocol` because of missing Version
field in the peer. And it also keeps the sequence correct, Version MUST be
sent first and ACKs can only follow it.
2019-11-06 18:05:50 +03:00
Roman Khimov
ec76ed23a5 network: rework peer handshaking, fix #458
This allows to start handshaking from both client and server (mainnet/testnet
nodes were seen to not care about string ordering for it), but still maintains
some sane checks in the process. It also makes functions thread-safe because
we have two goroutines servicing read and write side of the Peer connection,
so they can clash on access to the struct fields.

Add a test for it also.
2019-11-06 15:29:58 +03:00
Roman Khimov
e859e03240 network: split Peer's NetAddr into RemoteAddr and PeerAddr
As they are different things used for different purposes.
2019-11-06 15:26:24 +03:00
Roman Khimov
5bf00db2c9 io: move BinReader/BinWriter there, redo Serializable with it
The logic here is that we'll have all binary encoding/decoding done via our io
package, which simplifies error handling. This functionality doesn't belong to
util, so it's moved.

This also expands BufBinWriter with Reset() method to fit the needs of core
package.
2019-09-16 23:39:51 +03:00
Roman Khimov
d3bb8ddf8f network: handle errors and connection close more correctly
This makes writer side handle errors properly and fixes communication between
reader and writer goroutine to always correctly unregister the peer. This is
especially important for the case where error occurs before handshake
completes as in this case we don't even have goroutine in startProtocol()
running.
2019-09-16 16:32:04 +03:00
Roman Khimov
76c7cff67f network: make node strictly follow handshake procedure
Don't accept other messages before handshake is completed, check handshake
message sequence.
2019-09-16 16:32:04 +03:00
Roman Khimov
c6487423ae network: close connection on disconnect
If it's already closed, this won't hurt, but in the case of logical error it
saves us from leaking this connection (and potentially, peer).
2019-09-16 16:26:30 +03:00
Roman Khimov
8d9bc83214 util: drop Endpoint structure, fix #321
I think it's useless, buggy and hides parsing errors for no good reason.
2019-09-09 17:54:38 +03:00
Roman Khimov
a9b9c9226d *: add/fix godoc comments to satisfy golint
Fixes things like:
 * exported type/method/function X should have comment or be unexported
 * comment on exported type/method/function X should be of the form "X ..."
   (with optional leading article)

Refs. #213.
2019-09-03 17:57:51 +03:00
Anthony De Meulemeester
ab2568cc51
Fixed some networking issues (#68)
* Faster persist timer

* fixed networking issues.
2018-04-13 12:14:08 +02:00
Anthony De Meulemeester
b2021c126e
Tweaks for network and storage (#66)
* Made Encode/Decode message public.

* Added Redis storage driver and made some optimizations for the initialising the blockchain

* removed log lines in tcp_peer

* Added missing comments on exported methods.

* bumped version
2018-04-09 18:58:09 +02:00
Anthony De Meulemeester
aa4bc1b6e8
Node improvements (#47)
* block partial persist

* replaced refactored files with old one.

* removed gokit/log from deps

* Tweaks to not overburden remote nodes with getheaders/getblocks

* Changed Transporter interface to not take the server as argument due to a cause of race warning from the compiler

* started server test suite

* more test + return errors from message handlers

* removed --race from build

* Little improvements.
2018-03-14 10:36:59 +01:00
Anthony De Meulemeester
aa4bd34b6b
Node network improvements (#45)
* small improvements.

* Fixed datarace + cleanup node and peer

* bumped version.

* removed race flag to pass build
2018-03-10 13:04:06 +01:00
Anthony De Meulemeester
4023661cf1
Refactor of the Go node (#44)
* added headersOp for safely processing headers

* Better handling of protocol messages.

* housekeeping + cleanup tests

* Added more blockchain logic + unit tests

* fixed unreachable error.

* added structured logging for all (node) components.

* added relay flag + bumped version
2018-03-09 16:55:25 +01:00