tailscale

Commit Graph

Author	SHA1	Message	Date
Brad Fitzpatrick	c1cabe75dc	derp: fix server struct fielfd alignment on 32-bit Mostly so the GitHub CI will pass on 32-bit.	4 years ago
Brad Fitzpatrick	4732722b87	derp: add frameClosePeer to move around clients within a region For various reasons (mostly during rollouts or config changes on our side), nodes may end up connecting to a fallback DERP node in a region, rather than the primary one we tell them about in the DERP map. Connecting to the "wrong" node is fine, but it's in our best interest for all nodes in a domain to connect to the same node, to reduce intra-region packet forwarding. This adds a privileged frame type used by the control system that can kick off a client connection when they're connected to the wrong node in a region. Then they hopefully reconnect immediately to the correct location. (If not, we can leave them alone and stop closing them.) Updates tailscale/corp#372	4 years ago
Brad Fitzpatrick	dd43d9bc5f	derp: fix varz typo Updates tailscale/corp#391	4 years ago
Brad Fitzpatrick	b87396b5d9	cmd/derper, derp: add some more varz and consistency check handler I'm trying to hunt down a slow drift in numbers not agreeing.	4 years ago
Brad Fitzpatrick	6fbd1abcd3	derp: update peerGone code to work with regional DERP mesh clusters too Updates #150 Updates #388	4 years ago
Brad Fitzpatrick	07ca0c1c29	derp: fix tracking problem if conn starts local, then also joins mesh peer	5 years ago
Brad Fitzpatrick	1cb7dab881	cmd/derper: support forwarding packets amongst set of peer DERP servers Updates #388 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	4d599d194f	derp, derp/derphttp: add key accessors, add Client.RecvDetail Client.RecvDetail returns a connection generation so interested clients can detect when a reconnect happened. (Will be needed for #388)	5 years ago
Brad Fitzpatrick	b33c86b542	derp: add an unexported key.Public zero value variable to be less verbose	5 years ago
Brad Fitzpatrick	b663ab4685	cmd/derper: treat self-connection connection watch as no-op Updates #388	5 years ago
Brad Fitzpatrick	484b7fc9a3	derp, cmd/derper: add frameWatchConns, framePeerPresent for inter-DERP routing 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>	5 years ago
Dmitry Adamushko	f2c2d0de68	derp/derp_server: unregisterClient() for replaced client connections. 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>	5 years ago
Dmitry Adamushko	44434fdc82	derp/derp_server: fixed unbalanced {register,unregister}Client() calls. Signed-off-by: Dmitry Adamushko <da@stablebits.net>	5 years ago
Brad Fitzpatrick	1ab5b31c4b	derp, magicsock: send new "peer gone" frames when previous sender disconnects Updates #150 (not yet enabled by default in magicsock) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	8c4cef60f8	derp: wait for send goroutine to finish before returning from run 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.	5 years ago
Brad Fitzpatrick	521ad7b0fc	derp: only flush writes to clients when we're out of things to write Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	0a25abcdaa	derp: remove TODO comment It was done in `bf704a5218`	5 years ago
Brad Fitzpatrick	8519a1b29f	derp: revert rename of pkt to sendMsg New plan, sorry. Most reverts `77921a31b1`, except some doc changes.	5 years ago
Brad Fitzpatrick	c34b350efa	derp: remove the mutex around and closing of send channel Makes it less complicated. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	77921a31b1	derp: rename pkt to sendMsg, in prep for other types of writes Updates #150	5 years ago
Brad Fitzpatrick	1453aecb44	derp: add sclient.done channel, simplify some context passing 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.	5 years ago
David Anderson	ea90780066	derp: specify type of the by-reason drop varz. Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
Brad Fitzpatrick	fd824df1fa	derp: export metric for server's initial MemStats.Sys reading Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
David Anderson	64b5248929	derp: sprinkle comments and docstrings. Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
David Anderson	58b8ebd290	derp: add per-reason packet drop counter. In parallel with the summed counter for now, for dashboard migration. Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
David Anderson	1e031001db	derp: move write timeout to package constant. Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
David Anderson	dbfc916273	derp: add short queues between reader and writer, drop on overload. 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>	5 years ago
David Crawshaw	e838b3fb59	derp: use a write timeout when sending to clients Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	5 years ago
David Crawshaw	3df1b97ea8	derp: do not treat failure to relay as the fault of the sender 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>	5 years ago
David Crawshaw	43aa8595dd	derp: introduce Conn interface This lets us test with something other than a net.Conn. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	5 years ago
Brad Fitzpatrick	4fd29349b9	derp: add clients_replaced counter Updates #109	5 years ago
Brad Fitzpatrick	5d8001d0ad	derp: add varz for home moves Updates #162 Updates #163 (maybe) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	dd456f04c5	derp: actually record client's preferred bit	5 years ago
Brad Fitzpatrick	6978b93bdd	derp, magicsock: track home (preferred) vs visiting connections for stats	5 years ago
Brad Fitzpatrick	bf704a5218	derp: protocol negotiation, add v2: send src pub keys to clients in packets Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	e371520cc5	tsweb, derp: add expvar http.Handler for Prometheus's format And add some opinions. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	d59d0576af	derp: don't log on all dropped packets; super spammy Signed-off-by: Brad Fitzpatrick <brad@danga.com>	5 years ago
Brad Fitzpatrick	752146a70f	derp: clean up derphttp client code, use contexts Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	3317531021	derp: fix JSON field typo, sort fields to make it easier to see inconsistencies	5 years ago
Brad Fitzpatrick	6cd81d5d1f	derp: add more derp stats for dropped and received packets Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	2612e54ad1	derp, cmd/derper: add debug handlers, stats Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	379a3125fd	derp, wgengine/magicsock: support more than just packets from Client.Recv Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	88f1cc0c98	derp, cmd/derper: add rate limiting support, add default 5Mbps limit Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	322cb58b14	derp: deflake test I flaked up in earlier change I broke an invariant in `11048b8932` (it was even nicely documented then). Also clean up the test a bit from while I was debugging it. Fixes #84 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	f029c4c82d	derp: change the protocol framing to always include a length Addresses one of crawshaw's TODOs. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	11048b8932	derp: add docs on current protocol overview, break accept apart a bit Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	79af6054bf	derp: don't start sending keepalives to client until after serverInfo sent Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	4b461c2e77	derp: rename some things in the server, add some docs	5 years ago
Brad Fitzpatrick	619697063e	derp: more misc cleanups And add an explicit derphttp.Client.Connect in the test now that it's done lazily. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	259406e797	derp: move away from [32]byte key types And some minor cleanup in the process. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago

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53 Commits (75e1cc1dd510d70d1da63b84012e8bced29aeaaa)