Commit Graph

238 Commits

Author SHA1 Message Date
David Crawshaw
72dbf26f63 derp: test that client a->b and a->c relaying do not interfere
Without the recent write deadline introduction, this test fails.

They still do interfere, but the interference is now bound by
the write deadline. Many improvements are possible.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-03-12 14:42:48 -04:00
David Crawshaw
e838b3fb59 derp: use a write timeout when sending to clients
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-03-12 14:42:48 -04:00
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>
2020-03-12 14:42:48 -04:00
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>
2020-03-12 14:42:48 -04:00
Brad Fitzpatrick
4fd29349b9 derp: add clients_replaced counter
Updates #109
2020-03-11 11:55:43 -07:00
Brad Fitzpatrick
39c0ae1dba derp/derpmap: new DERP config package, merge netcheck into magicsock more
Fixes #153
Updates #162
Updates #163

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-10 10:37:25 -07:00
Brad Fitzpatrick
5d8001d0ad derp: add varz for home moves
Updates #162
Updates #163 (maybe)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-09 11:09:27 -07:00
Brad Fitzpatrick
e733fa6f7e derp: add some varz tests for active/home conns 2020-03-05 20:29:07 -08:00
Brad Fitzpatrick
dd456f04c5 derp: actually record client's preferred bit 2020-03-05 19:02:54 -08:00
Brad Fitzpatrick
6978b93bdd derp, magicsock: track home (preferred) vs visiting connections for stats 2020-03-05 15:00:56 -08:00
Brad Fitzpatrick
cf4aacde57 derp/derphttp: appease staticcheck 2020-03-05 12:34:57 -08:00
Brad Fitzpatrick
2cff9016e4 net/dnscache: add overly simplistic DNS cache package for selective use
I started to write a full DNS caching resolver and I realized it was
overkill and wouldn't work on Windows even in Go 1.14 yet, so I'm
doing this tiny one instead for now, just for all our netcheck STUN
derp lookups, and connections to DERP servers. (This will be caching a
exactly 8 DNS entries, all ours.)

Fixes #145 (can be better later, of course)
2020-03-05 12:23:37 -08:00
Brad Fitzpatrick
bf704a5218 derp: protocol negotiation, add v2: send src pub keys to clients in packets
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-04 09:55:13 -08:00
David Crawshaw
9be9738f62 derphttp: add TLSConfig field
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-03-04 12:40:33 -05:00
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>
2020-03-03 13:59:16 -08:00
Brad Fitzpatrick
517a91de75 derp/derphttp: fix reconnect behavior
I broke it in today's 752146a70f.

Added some comments to prevent recurrences.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-28 13:39:48 -08:00
Brad Fitzpatrick
d59d0576af derp: don't log on all dropped packets; super spammy
Signed-off-by: Brad Fitzpatrick <brad@danga.com>
2020-02-28 13:33:47 -08:00
Brad Fitzpatrick
38acccad09 derp: remove some debug noise I left in
:(
2020-02-28 13:20:56 -08:00
Brad Fitzpatrick
752146a70f derp: clean up derphttp client code, use contexts
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-28 13:18:59 -08:00
Brad Fitzpatrick
3317531021 derp: fix JSON field typo, sort fields to make it easier to see inconsistencies 2020-02-21 14:18:09 -08:00
Brad Fitzpatrick
6cd81d5d1f derp: add more derp stats for dropped and received packets
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-21 14:13:50 -08:00
Brad Fitzpatrick
2612e54ad1 derp, cmd/derper: add debug handlers, stats
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-21 09:35:53 -08:00
Brad Fitzpatrick
379a3125fd derp, wgengine/magicsock: support more than just packets from Client.Recv
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 22:08:13 -08:00
Brad Fitzpatrick
88f1cc0c98 derp, cmd/derper: add rate limiting support, add default 5Mbps limit
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 15:26:30 -08:00
Brad Fitzpatrick
1166c34f6c derp: fix staticcheck warning
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 14:49:47 -08:00
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>
2020-02-20 14:41:39 -08:00
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>
2020-02-20 13:37:44 -08:00
Brad Fitzpatrick
11048b8932 derp: add docs on current protocol overview, break accept apart a bit
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 09:57:05 -08:00
Brad Fitzpatrick
79af6054bf derp: don't start sending keepalives to client until after serverInfo sent
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 09:34:01 -08:00
Brad Fitzpatrick
1155716318 derp: rename some things in the client, add some docs
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 09:11:56 -08:00
Brad Fitzpatrick
4b461c2e77 derp: rename some things in the server, add some docs 2020-02-20 08:50:25 -08:00
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>
2020-02-18 10:09:37 -08:00
Brad Fitzpatrick
e06ca40650 wgengine, magicsock, derp: misc cleanups, docs
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-18 08:58:00 -08:00
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>
2020-02-17 14:18:09 -08:00
Brad Fitzpatrick
769e25e37b derp: use new types/key package
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-17 13:29:49 -08:00
Brad Fitzpatrick
2896be60db Move "logger" package to under types, now that we have it.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-14 20:23:05 -08:00
Brad Fitzpatrick
a59dc5f155 Use logger.Logf consistently. It was used in most places.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-11 09:38:32 -08:00
Earl Lee
a8d8b8719a Move Linux client & common packages into a public repo. 2020-02-09 09:32:57 -08:00