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75 Commits

Author SHA1 Message Date
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.
 2020-06-23 14:01:51 -07:00
Brad Fitzpatrick
c8cf3169ba cmd/derper, derp/derphttp: move bulk of derp mesh code into derphttp 
To be reused in various other tools.
 2020-06-15 11:58:10 -07:00
Brad Fitzpatrick
7cbf6ab771 cmd/derper: remove unused parameter in runMeshClient 2020-06-15 11:35:50 -07:00
Brad Fitzpatrick
abd79ea368 derp: reduce DERP memory use; don't require callers to pass in memory to use 
The magicsock derpReader was holding onto 65KB for each DERP
connection forever, just in case.

Make the derp{,http}.Client be in charge of memory instead. It can
reuse its bufio.Reader buffer space.
 2020-06-15 10:26:50 -07:00
Brad Fitzpatrick
1cb7dab881 cmd/derper: support forwarding packets amongst set of peer DERP servers 
Updates #388

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-06-05 10:14:33 -07:00
Brad Fitzpatrick
b663ab4685 cmd/derper: treat self-connection connection watch as no-op 
Updates #388
 2020-06-04 08:26:05 -07:00
Brad Fitzpatrick
5798826990 cmd/derper: add /home/bradfitz/keys to default mesh key search list 2020-06-04 08:19:44 -07:00
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>
 2020-06-03 08:03:29 -07:00
Brad Fitzpatrick
b0c10fa610 stun, netcheck: move under net 2020-05-25 09:18:24 -07:00
David Anderson
1e031001db derp: move write timeout to package constant. 
Signed-off-by: David Anderson <dave@natulte.net>
 2020-03-20 15:14:01 -07:00
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>
 2020-03-20 15:14:01 -07:00
David Crawshaw
5ad947c761 cmd/derper: set a write timeout 
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-03-12 14:42:48 -04:00
Brad Fitzpatrick
8abdbbdd1f cmd/derper: also link to /debug/varz 2020-03-06 13:02:01 -08:00
David Anderson
f192c05413 metrics: add a LabelMap type for variables with 1 label dimension. 
This lets us publish sets of vars that are breakdowns along one
dimension in a format that Prometheus and Grafana natively know
how to do useful things with.

Signed-off-by: David Anderson <dave@natulte.net>
 2020-03-04 13:22:50 -08:00
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
dd68debd64 cmd/derper: set autocert Email 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-03-03 13:30:50 -08:00
Brad Fitzpatrick
a399ef3dc7 cmd/derper: appease staticcheck 2020-03-02 08:59:50 -08:00
Brad Fitzpatrick
051b6ef141 cmd/derper: accept more LetsEncrypt hostnames without explicit config 2020-03-02 08:55:44 -08:00
Brad Fitzpatrick
00ad93ec25 cmd/derper: add a STUN server 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-26 19:11:14 -08:00
Brad Fitzpatrick
824f825552 tsweb, cmd/derper: move common web/debug stuff from derper to new tsweb 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-25 10:06:56 -08:00
Brad Fitzpatrick
c763901b1a cmd/derper: provide debug access over port 80 to trusted (tailscale) IPs 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-21 11:52:27 -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
37e115834e cmd/derper: support logging to logtail 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-21 07:53:22 -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
b72e6446e2 cmd/derper: add a basic DERP server 
Mostly Crawshaw's earlier code, refactored a bit.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-18 11:25:11 -08:00