mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-18 19:15:19 +00:00
209e68c1ba
Also adds idle time and keepalive parameters because how this is configured has changed in the new package version. The values are those that seems like might already be default, if keep-alives were enabled, which is not obvious from the doc comments. Also, Go 1.19 gofmt reformatting of comments.
75 lines
2.8 KiB
Go
75 lines
2.8 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
|
|
/*
|
|
Package discover implements the local and global device discovery protocols.
|
|
|
|
Global Discovery
|
|
================
|
|
|
|
Announcements
|
|
-------------
|
|
|
|
A device should announce itself at startup. It does this by an HTTPS POST to
|
|
the announce server URL (with the path usually being "/", but this is of
|
|
course up to the discovery server). The POST has a JSON payload listing direct
|
|
connection addresses (if any) and relay addresses (if any).
|
|
|
|
{
|
|
direct: ["tcp://192.0.2.45:22000", "tcp://:22202"],
|
|
relays: [{"url": "relay://192.0.2.99:22028", "latency": 142}]
|
|
}
|
|
|
|
It's OK for either of the "direct" or "relays" fields to be either the empty
|
|
list ([]), null, or missing entirely. An announcement with both fields missing
|
|
or empty is however not useful...
|
|
|
|
Any empty or unspecified IP addresses (i.e. addresses like tcp://:22000,
|
|
tcp://0.0.0.0:22000, tcp://[::]:22000) are interpreted as referring to the
|
|
source IP address of the announcement.
|
|
|
|
The device ID of the announcing device is not part of the announcement.
|
|
Instead, the server requires that the client perform certificate
|
|
authentication. The device ID is deduced from the presented certificate.
|
|
|
|
The server response is empty, with code 200 (OK) on success. If no certificate
|
|
was presented, status 403 (Forbidden) is returned. If the posted data doesn't
|
|
conform to the expected format, 400 (Bad Request) is returned.
|
|
|
|
In successful responses, the server may return a "Reannounce-After" header
|
|
containing the number of seconds after which the client should perform a new
|
|
announcement.
|
|
|
|
In error responses, the server may return a "Retry-After" header containing
|
|
the number of seconds after which the client should retry.
|
|
|
|
Performing announcements significantly more often than indicated by the
|
|
Reannounce-After or Retry-After headers may result in the client being
|
|
throttled. In such cases the server may respond with status code 429 (Too Many
|
|
Requests).
|
|
|
|
Queries
|
|
=======
|
|
|
|
Queries are performed as HTTPS GET requests to the announce server URL. The
|
|
requested device ID is passed as the query parameter "device", in canonical
|
|
string form, i.e. https://announce.syncthing.net/?device=ABC12345-....
|
|
|
|
Successful responses will have status code 200 (OK) and carry a JSON payload
|
|
of the same format as the announcement above. The response will not contain
|
|
empty or unspecified addresses.
|
|
|
|
If the "device" query parameter is missing or malformed, the status code 400
|
|
(Bad Request) is returned.
|
|
|
|
If the device ID is of a valid format but not found in the registry, 404 (Not
|
|
Found) is returned.
|
|
|
|
If the client has exceeded a rate limit, the server may respond with 429 (Too
|
|
Many Requests).
|
|
*/
|
|
package discover
|