1cb7dab881
cmd/derper: support forwarding packets amongst set of peer DERP servers
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Updates #388
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-06-05 10:14:33 -07:00
4d599d194f
derp, derp/derphttp: add key accessors, add Client.RecvDetail
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Client.RecvDetail returns a connection generation so interested clients
can detect when a reconnect happened. (Will be needed for #388 )
2020-06-04 11:35:53 -07:00
b33c86b542
derp: add an unexported key.Public zero value variable to be less verbose
2020-06-04 11:28:00 -07:00
b663ab4685
cmd/derper: treat self-connection connection watch as no-op
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Updates #388
2020-06-04 08:26:05 -07:00
484b7fc9a3
derp, cmd/derper: add frameWatchConns, framePeerPresent for inter-DERP routing
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This lets a trusted DERP client that knows a pre-shared key subscribe
to the connection list. Upon subscribing, they get the current set
of connected public keys, and then all changes over time.
This lets a set of DERP server peers within a region all stay connected to
each other and know which clients are connected to which nodes.
Updates #388
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-06-03 08:03:29 -07:00
f2c2d0de68
derp/derp_server: unregisterClient() for replaced client connections.
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When unregistering a replaced client connection, move the
still-connected peers to the current client connecition. Inform
the peers that we've gone only when unregistering the active
client connection.
Signed-off-by: Dmitry Adamushko <da@stablebits.net >
2020-04-10 08:52:30 -07:00
44434fdc82
derp/derp_server: fixed unbalanced {register,unregister}Client() calls.
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Signed-off-by: Dmitry Adamushko <da@stablebits.net >
2020-04-06 15:13:47 -07:00
1ab5b31c4b
derp, magicsock: send new "peer gone" frames when previous sender disconnects
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Updates #150 (not yet enabled by default in magicsock)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-22 21:00:47 -07:00
8c4cef60f8
derp: wait for send goroutine to finish before returning from run
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I saw a test flake due to the sender goroutine logging (ultimately to
t.Logf) after the server was closed.
This makes sure the all goroutines are cleaned up before Server.Close
returns.
2020-03-22 13:10:07 -07:00
521ad7b0fc
derp: only flush writes to clients when we're out of things to write
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-22 08:01:25 -07:00
0a25abcdaa
derp: remove TODO comment
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It was done in bf704a5218
2020-03-22 07:54:50 -07:00
8519a1b29f
derp: revert rename of pkt to sendMsg
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New plan, sorry.
Most reverts 77921a31b1
2020-03-21 22:17:22 -07:00
c34b350efa
derp: remove the mutex around and closing of send channel
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Makes it less complicated.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-21 22:00:04 -07:00
77921a31b1
derp: rename pkt to sendMsg, in prep for other types of writes
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Updates #150
2020-03-21 20:34:49 -07:00
1453aecb44
derp: add sclient.done channel, simplify some context passing
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This is mostly prep for a few future CLs, making sure we always have a
close-on-dead done channel available to select on when doing other
channel operations.
2020-03-21 18:28:34 -07:00
ea90780066
derp: specify type of the by-reason drop varz.
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Signed-off-by: David Anderson <dave@natulte.net >
2020-03-20 15:53:04 -07:00
fd824df1fa
derp: export metric for server's initial MemStats.Sys reading
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-20 15:37:36 -07:00
64b5248929
derp: sprinkle comments and docstrings.
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Signed-off-by: David Anderson <dave@natulte.net >
2020-03-20 15:14:01 -07:00
58b8ebd290
derp: add per-reason packet drop counter.
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In parallel with the summed counter for now, for dashboard migration.
Signed-off-by: David Anderson <dave@natulte.net >
2020-03-20 15:14:01 -07:00
1e031001db
derp: move write timeout to package constant.
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Signed-off-by: David Anderson <dave@natulte.net >
2020-03-20 15:14:01 -07:00
dbfc916273
derp: add short queues between reader and writer, drop on overload.
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This avoids the server blocking on misbehaving or heavily contended
clients. We attempt to drop from the head of the queue to keep
overall queueing time lower.
Also:
- fixes server->client keepalives, which weren't happening.
- removes read rate-limiter, deferring instead to kernel-level
global limiter/fair queuer.
Signed-off-by: David Anderson <dave@natulte.net >
2020-03-20 15:14:01 -07:00
e838b3fb59
derp: use a write timeout when sending to clients
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Signed-off-by: David Crawshaw <crawshaw@tailscale.com >
2020-03-12 14:42:48 -04:00
3df1b97ea8
derp: do not treat failure to relay as the fault of the sender
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If Alice attempts to send a packet to Bob and the DERP server
encounters an error on the socket to Bob, we should not disconnect
Alice for that.
Signed-off-by: David Crawshaw <crawshaw@tailscale.com >
2020-03-12 14:42:48 -04:00
43aa8595dd
derp: introduce Conn interface
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This lets us test with something other than a net.Conn.
Signed-off-by: David Crawshaw <crawshaw@tailscale.com >
2020-03-12 14:42:48 -04:00
4fd29349b9
derp: add clients_replaced counter
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Updates #109
2020-03-11 11:55:43 -07:00
5d8001d0ad
derp: add varz for home moves
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Updates #162
Updates #163 (maybe)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-09 11:09:27 -07:00
dd456f04c5
derp: actually record client's preferred bit
2020-03-05 19:02:54 -08:00
6978b93bdd
derp, magicsock: track home (preferred) vs visiting connections for stats
2020-03-05 15:00:56 -08:00
bf704a5218
derp: protocol negotiation, add v2: send src pub keys to clients in packets
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-04 09:55:13 -08:00
e371520cc5
tsweb, derp: add expvar http.Handler for Prometheus's format
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And add some opinions.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-03-03 13:59:16 -08:00
d59d0576af
derp: don't log on all dropped packets; super spammy
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Signed-off-by: Brad Fitzpatrick <brad@danga.com >
2020-02-28 13:33:47 -08:00
752146a70f
derp: clean up derphttp client code, use contexts
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-28 13:18:59 -08:00
3317531021
derp: fix JSON field typo, sort fields to make it easier to see inconsistencies
2020-02-21 14:18:09 -08:00
6cd81d5d1f
derp: add more derp stats for dropped and received packets
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-21 14:13:50 -08:00
2612e54ad1
derp, cmd/derper: add debug handlers, stats
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-21 09:35:53 -08:00
379a3125fd
derp, wgengine/magicsock: support more than just packets from Client.Recv
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-20 22:08:13 -08:00
88f1cc0c98
derp, cmd/derper: add rate limiting support, add default 5Mbps limit
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-20 15:26:30 -08:00
322cb58b14
derp: deflake test I flaked up in earlier change
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I broke an invariant in 11048b8932Fixes #84
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-20 14:41:39 -08:00
f029c4c82d
derp: change the protocol framing to always include a length
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Addresses one of crawshaw's TODOs.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-20 13:37:44 -08:00
11048b8932
derp: add docs on current protocol overview, break accept apart a bit
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-20 09:57:05 -08:00
79af6054bf
derp: don't start sending keepalives to client until after serverInfo sent
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-20 09:34:01 -08:00
4b461c2e77
derp: rename some things in the server, add some docs
2020-02-20 08:50:25 -08:00
619697063e
derp: more misc cleanups
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And add an explicit derphttp.Client.Connect in the test now that it's
done lazily.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-18 10:09:37 -08:00
259406e797
derp: move away from [32]byte key types
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And some minor cleanup in the process.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-17 14:18:09 -08:00
2896be60db
Move "logger" package to under types, now that we have it.
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-14 20:23:05 -08:00
a59dc5f155
Use logger.Logf consistently. It was used in most places.
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com >
2020-02-11 09:38:32 -08:00
a8d8b8719a
Move Linux client & common packages into a public repo.
2020-02-09 09:32:57 -08:00
