Commit Graph

36 Commits

Author SHA1 Message Date
Jakob Borg
0b193b76c2
lib/config, lib/connections: Add optional connection limits (fixes #7176) (#7223)
This adds two new configuration options:

    // The number of connections at which we stop trying to connect to more
    // devices, zero meaning no limit. Does not affect incoming connections.
    ConnectionLimitEnough int

    // The maximum number of connections which we will allow in total, zero
    // meaning no limit. Affects incoming connections and prevents
    // attempting outgoing connections.
    ConnectionLimitMax int

These can be used to limit the number of concurrent connections in
various ways.
2021-01-11 15:14:44 +01:00
Jakob Borg
b13b15758d
lib/connections, lib/model: Track last connection duration (ref #7223) (#7242)
This adds a statistic to track the last connection duration per device.
It isn't used for much in this PR, but it's available for #7223 to use
in deciding how to order device connection attempts (deprioritizing
devices that just dropped our connection the last time).
2021-01-05 17:45:07 +01:00
Simon Frei
c845e245a1
lib: Close underlying conn in protocol (fixes #7165) (#7212) 2020-12-21 11:40:51 +01:00
Simon Frei
9524b51708
all: Implement suture v4-api (#6947) 2020-11-17 13:19:04 +01:00
Simon Frei
1b1d38183d
lib: Remove HelloResult type, same as Hello (#7015) 2020-09-29 12:17:38 +01:00
Audrius Butkevicius
7dc290c3ed
lib/connections: React to listeners going up and down faster (#6590) 2020-05-11 15:02:22 +02:00
Simon Frei
1bae4b7f50 all: Use context in lib/dialer (#6177)
* all: Use context in lib/dialer

* a bit slimmer

* https://github.com/syncthing/syncthing/pull/5753

* bot

* missed adding debug.go

* errors.Cause

* simultaneous dialing

* anti-leak
2019-11-26 07:39:51 +00:00
Simon Frei
33258b06f4 lib/connections: Dialer code deduplication (#6187) 2019-11-26 07:36:58 +00:00
Audrius Butkevicius
58ef5368f8
lib/connections: Validate device id before assuming success (fixes #5934) (#5935)
* lib/connections: Validate device id before assuming success (fixes #5934)

* Vet
2019-08-09 12:31:42 +01:00
Simon Frei
ba056578ec
lib: Add util.Service as suture.Service template (fixes #5801) (#5806) 2019-07-09 11:40:30 +02:00
Audrius Butkevicius
e714df013f lib/connections: Add QUIC protocol support (fixes #5377) (#5737) 2019-05-29 09:56:40 +02:00
Jakob Borg
2c866277a2 lib/api, lib/connections, gui: Show connection error for disconnected devices (fixes #3345) (#5727)
* lib/api, lib/connections, gui: Show connection error for disconnected devices (fixes #3345)

This adds functionality in the connetions service to track the last
error per address. That is in turn exposed in the /rest/system/status
API method, as that is also where we already show the listener status
from the connection service.

The GUI uses this info where it lists addresses, showing errors (if any)
in red underneath each address.

I also slightly refactored the existing status method on the connection
service to have a better name and return typed information.

* ok

* review

* formatting

* review
2019-05-16 22:11:45 +01:00
Jakob Borg
f24676ba5a
lib/tlsutil: Enable TLS 1.3 when available, on test builds (fixes #5065) (#5558)
* lib/tlsutil: Enable TLS 1.3 when available, on test builds (fixes #5065)

This enables TLS 1.3 negotiation on Go 1.12 by setting the GODEBUG
variable. For now, this just gets enabled on test versions (those with a
dash in the version number).

Users wishing to enable this on production builds can set GODEBUG
manually.

The string representation of connections now includes the TLS version
and cipher suite. This becomes part of the log output on connections.
That is, when talking to an old client:

    Established secure connection .../TLS1.2-TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256

and now potentially:

    Established secure connection .../TLS1.3-TLS_AES_128_GCM_SHA256

(The cipher suite was there previously in the log output, but not the
TLS version.)

I also added this info as a new Crypto() method on the connection, and
propagate this out to the API and GUI, where it can be seen in the
connection address hover (although with bad word wrapping sometimes).

* wip

* wip
2019-02-26 11:49:02 +01:00
Simon Frei
722b3fce6a all: Hide implementations behind interfaces for mocked testing (#5548)
* lib/model: Hide implementations behind interfaces for mocked testing

* review
2019-02-26 08:09:25 +00:00
Jakob Borg
c2ddc83509 all: Revert the underscore sillyness 2019-02-02 12:16:27 +01:00
Jakob Borg
df5c1eaf01
all: Bunch of more linter fixes (#5500) 2019-02-02 11:02:28 +01:00
Simon Frei
24ffd8be99 all: Send Close BEP msg on intentional disconnect (#5440)
This avoids waiting until next ping and timeout until the connection is actually
closed both by notifying the peer of the disconnect and by immediately closing
the local end of the connection after that. As a nice side effect, info level
logging about dropped connections now have the actual reason in it, not a generic
timeout error which looks like a real problem with the connection.
2019-01-09 17:31:09 +01:00
Jakob Borg
b97d5bcca8
Remove KCP (fixes #4737) (#4741) 2018-02-09 11:40:57 +01:00
Simon Frei
341b9691a7 lib/connections, lib/model: Additional connection info in logs (fixes #4499)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4665
2018-01-12 11:27:55 +00:00
Audrius Butkevicius
4922b46fbd lib/connections: Fix local address priority
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4534
LGTM: imsodin, calmh
2017-11-22 07:05:49 +00:00
Audrius Butkevicius
44a542391e lib/connections: Trust the model to tell us if we are connected
This should address issue as described in https://forum.syncthing.net/t/stun-nig-party-with-paused-devices/10942/13
Essentially the model and the connection service goes out of sync in terms of thinking if we are connected or not.
Resort to model as being the ultimate source of truth.

I can't immediately pin down how this happens, yet some ideas.

ConfigSaved happens in separate routine, so it's possbile that we have some sort of device removed yet connection comes in parallel kind of thing.
However, in this case the connection exists in the model, and does not exist in the connection service and the only way for the connection to be removed
in the connection service is device removal from the config.

Given the subject, this might also be related to the device being paused.

Also, adds more info to the logs

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4533
2017-11-21 07:25:38 +00:00
Jakob Borg
72d645865e lib/connections: Fix race condition in parallel dial, minor cleanups (fixes #4526)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4527
2017-11-19 17:38:13 +00:00
AudriusButkevicius
aecd7c64ce lib/connections: Parallel dials in the same priority (fixes #4456)
Well Tested(TM)

Introduces a potential issue where we always pick some connectable but dodgy connection that breaks
soon after the TLS handshake.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4489
2017-11-15 09:36:33 +00:00
AudriusButkevicius
0ee1146e1c lib/connections: Indicate stack in transport (fixes #4463)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4486
2017-11-07 07:25:05 +00:00
Audrius Butkevicius
2760d032ca cmd/syncthing: Add more stats to usage reports (ref #3628)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4347
2017-10-12 06:16:46 +00:00
Audrius Butkevicius
0da0774ce4 lib/connections: Add KCP support (fixes #804)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3489
2017-03-07 12:44:16 +00:00
Jakob Borg
f7fc0c1d3e all: Update license url to https (ref #3976) 2017-02-09 08:04:16 +01:00
Audrius Butkevicius
bab7c8ebbf all: Add folder pause, make pauses permanent (fixes #3407, fixes #215, fixes #3001)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3520
2016-12-21 18:41:25 +00:00
Jakob Borg
ed4f6fc4b3 lib/connections, lib/model: Connection service should expose a single interface
Makes testing easier, which we'll need

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3771
2016-11-30 07:54:20 +00:00
Jakob Borg
e52be3d83e lib/connections, lib/model: Refactor connection close handling (fixes #3466)
So there were some issues here. The main problem was that
model.Close(deviceID) was overloaded to mean "the connection was closed
by the protocol layer" and "i want to close this connection". That meant
it could get called twice - once *to* close the connection and then once
more when the connection *was* closed.

After this refactor there is instead a Closed(conn) method that is the
callback. I didn't need to change the parameter in the end, but I think
it's clearer what it means when it takes the connection that was closed
instead of a device ID. To close a connection, the new close(deviceID)
method is used instead, which only closes the underlying connection and
leaves the cleanup to the Closed() callback.

I also changed how we do connection switching. Instead of the connection
service calling close and then adding the connection, it just adds the
new connection. The model knows that it already has a connection and
makes sure to close and clean out that one before adding the new
connection.

To make sure to sequence this properly I added a new map of channels
that get created on connection add and closed by Closed(), so that
AddConnection() can do the close and wait for the cleanup to happen
before proceeding.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3490
2016-08-10 09:37:32 +00:00
Jakob Borg
f368d2278f lib/config, lib/connections: Refactor handling of ignored devices (fixes #3470)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3471
2016-08-05 09:29:49 +00:00
Jakob Borg
fa0101bd60 lib/protocol, lib/discover, lib/db: Use protocol buffer serialization (fixes #3080)
This changes the BEP protocol to use protocol buffer serialization
instead of XDR, and therefore also the database format. The local
discovery protocol is also updated to be protocol buffer format.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3276
LGTM: AudriusButkevicius
2016-07-04 10:40:29 +00:00
Jakob Borg
d507126101 lib/protocol: Understand older/newer Hello messages (fixes #3287)
This is in preparation for future changes, but also improves the
handling when talking to pre-v0.13 clients. It breaks out the Hello
message and magic from the rest of the protocol implementation, with the
intention that this small part of the protocol will survive future
changes.

To enable this, and future testing, the new ExchangeHello function takes
an interface that can be implemented by future Hello versions and
returns a version indendent result type. It correctly detects pre-v0.13
protocols and returns a "too old" error message which gets logged to the
user at warning level:

   [I6KAH] 09:21:36 WARNING: Connecting to [...]:
     the remote device speaks an older version of the protocol (v0.12) not
     compatible with this version

Conversely, something entirely unknown will generate:

   [I6KAH] 09:40:27 WARNING: Connecting to [...]:
     the remote device speaks an unknown (newer?) version of the protocol

The intention is that in future iterations the Hello exchange will
succeed on at least one side and ExchangeHello will return the actual
data from the Hello together with ErrTooOld and an even more precise
message can be generated.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3289
2016-06-09 10:50:14 +00:00
Jakob Borg
2c1323ece6 lib/connections: Un-deprecate relaysEnabled (fixes #3074)
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3098
2016-05-17 00:05:38 +00:00
Jakob Borg
d77d8ff803 lib/connections: Don't look at devices that are already optimally connected
Just an optimization. Required exposing the priority from the factory,
so made that an interface with an extra method instead of just a func
type.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3071
2016-05-09 15:33:25 +00:00
Audrius Butkevicius
674fc566bb lib/connections: Refactor
1. Removes separate relay lists and relay clients/services, just makes it a listen address
2. Easier plugging-in of other transports
3. Allows "hot" disabling and enabling NAT services
4. Allows "hot" listen address changes
5. Changes listen address list with a preferable "default" value just like for discovery
6. Debounces global discovery announcements as external addresses change (which it might alot upon starting)
7. Stops this whole "pick other peers relay by latency". This information is no longer available,
   but I don't think it matters as most of the time other peer only has one relay.
8. Rename ListenAddress to ListenAddresses, as well as in javascript land.
9. Stop serializing deprecated values to JSON

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/2982
2016-05-04 19:38:12 +00:00