tailscale

Commit Graph

Author	SHA1	Message	Date
Brad Fitzpatrick	79d8288f0a	wgengine/magicsock, derp, derp/derphttp: respond to DERP server->client pings No server support yet, but we want Tailscale 1.6 clients to be able to respond to them when the server can do it. Updates #1310 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	e415991256	derp, derp/derphttp: remove one RTT from DERP setup * advertise server's DERP public key following its ServerHello * have client look for that DEPR public key in the response PeerCertificates * let client advertise it's going into a "fast start" mode if it finds it * modify server to support that fast start mode, just not sending the HTTP response header Cuts down another round trip, bringing the latency of being able to write our first DERP frame from SF to Bangalore from ~725ms (3 RTT) to ~481ms (2 RTT: TCP and TLS). Fixes #693 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	93ffc565e5	derp: remove protocol version 1 support It hasn't existed for a long time and there are no current users. Fixes #199	4 years ago
Brad Fitzpatrick	6b80bcf112	derp: remove a client round-trip waiting on serverInfo It just has a version number in it and it's not really needed. Instead just return it as a normal Recv message type for those that care (currently only tests). Updates #150 (in that it shares the same goal: initial DERP latency) Updates #199 (in that it removes some DERP versioning)	4 years ago
Josh Bleecher Snyder	e577303dc7	derp: make writeUint32 and readUint32 not allocate The allocations are small, but they're easy enough to avoid. And it removes some clutter from the pprof output. name old time/op new time/op delta SendRecv/msgsize=10-8 10.1µs ± 9% 9.7µs ± 7% -3.45% (p=0.035 n=14+14) SendRecv/msgsize=100-8 8.12µs ± 7% 7.38µs ± 9% -9.02% (p=0.000 n=15+15) SendRecv/msgsize=1000-8 9.51µs ±25% 8.76µs ±22% ~ (p=0.202 n=15+15) SendRecv/msgsize=10000-8 21.1µs ±25% 19.9µs ±14% ~ (p=0.270 n=15+14) WriteUint32-8 25.1ns ± 4% 21.3ns ±12% -15.01% (p=0.000 n=14+14) ReadUint32-8 35.4ns ± 4% 21.9ns ± 4% -38.06% (p=0.000 n=15+15) name old alloc/op new alloc/op delta SendRecv/msgsize=10-8 182B ± 2% 169B ± 1% -7.22% (p=0.000 n=15+13) SendRecv/msgsize=100-8 282B ± 1% 265B ± 1% -5.85% (p=0.000 n=15+15) SendRecv/msgsize=1000-8 1.19kB ± 1% 1.18kB ± 0% -1.26% (p=0.000 n=14+15) SendRecv/msgsize=10000-8 19.3kB ± 4% 18.7kB ± 4% -3.44% (p=0.006 n=12+12) WriteUint32-8 4.00B ± 0% 0.00B -100.00% (p=0.000 n=15+15) ReadUint32-8 4.00B ± 0% 0.00B -100.00% (p=0.000 n=15+15) name old allocs/op new allocs/op delta SendRecv/msgsize=10-8 8.00 ± 0% 4.00 ± 0% -50.00% (p=0.000 n=15+15) SendRecv/msgsize=100-8 8.00 ± 0% 4.00 ± 0% -50.00% (p=0.000 n=15+15) SendRecv/msgsize=1000-8 8.00 ± 0% 4.00 ± 0% -50.00% (p=0.000 n=15+15) SendRecv/msgsize=10000-8 8.47 ±17% 5.00 ± 0% -40.94% (p=0.000 n=15+14) WriteUint32-8 1.00 ± 0% 0.00 -100.00% (p=0.000 n=15+15) ReadUint32-8 1.00 ± 0% 0.00 -100.00% (p=0.000 n=15+15) Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>	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	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	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	806645ea0e	derp: prevent readFrame() from reading more than len(b) bytes. 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	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	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	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	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

17 Commits (018200aebaf77daa14bbc33c7131d9c07a3d9ee7)