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Author SHA1 Message Date
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)
 2020-08-17 16:15:22 -07:00
Brad Fitzpatrick
f6dc47efe4 tailcfg, controlclient, magicsock: add control feature flag to enable DRPO 
Updates #150
 2020-08-17 13:01:39 -07:00
Brad Fitzpatrick
771e9541c7 cmd/tailscale/cli: appease staticcheck 2020-08-17 13:01:39 -07:00
Brad Fitzpatrick
337c86b89d control/controlclient: don't crash on invalid filter CIDR from server 
Fixes #691
 2020-08-17 07:56:03 -07:00
Brad Fitzpatrick
e64ab89712 derp/derpmap: add Bangalore and Tokyo 2020-08-14 13:29:14 -07:00
Brad Fitzpatrick
adf4f3cce0 cmd/tailscale/cli: make netcheck sort regions, show full region names 2020-08-14 13:29:02 -07:00
Brad Fitzpatrick
80d0b88a89 derp/derpmap: fix constructor argument order 
Fix of 3e2bfe48c3
 2020-08-14 13:21:48 -07:00
Ross Zurowski
f90f35c123
Merge pull request #686 from tailscale/rosszurowski/add-region-name-to-derpmap 
derpmap: add full region name
 2020-08-14 16:11:29 -04:00
Ross Zurowski
3e2bfe48c3
derpmap: add full region name 
We're beginning to reference DERP region names in the admin UI, so it's
best to consolidate this information in our DERP map.

Signed-off-by: Ross Zurowski <ross@rosszurowski.com>
 2020-08-14 15:57:11 -04:00
Josh Bleecher Snyder
062bd67d3b derp: use rand instead of crypto/rand to generate jitter 
We don't need crypto/rand. Let the OS keep its entropy bits.

Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
 2020-08-13 14:06:50 -07:00
Brad Fitzpatrick
dbb4c246fa wgengine/monitor: add Windows linkchange monitor 
Updates tailscale/corp#553

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-13 07:39:26 -07:00
Brad Fitzpatrick
85c3d17b3c wgengine/magicsock: use disco ping src as a candidate endpoint 
Consider:

   Hard NAT (A) <---> Hard NAT w/ mapped port (B)

If A sends a packet to B's mapped port, A can disco ping B directly,
with low latency, without DERP.

But B couldn't establish a path back to A and needed to use DERP,
despite already logging about A's endpoint and adding a mapping to it
for other purposes (the wireguard conn.Endpoint lookup also needed
it).

This adds the tracking to discoEndpoint too so it'll be used for
finding a path back.

Fixes tailscale/corp#556

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-12 21:33:43 -07:00
Brad Fitzpatrick
0512fd89a1 wgengine/magicsock: simplify handlePingLocked 
It's no longer true that 'de may be nil'
 2020-08-12 19:25:38 -07:00
David Anderson
37c19970b3 derp: add a debug option to verbosely log drops to a destination. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2020-08-12 15:27:01 -07:00
Josh Bleecher Snyder
909c165382 derp: remove two key.Public allocations 
Reading and writing a [32]byte key to a bufio.Reader/bufio.Writer
can easily by done without allocating. Do so.

It is slower; on my machine, it adds about 100ns per read/write.
However, the overall request takes a minimum of several µs,
and it cuts allocations meaningfully, so it is probably worth it.

name                      old time/op    new time/op    delta
SendRecv/msgsize=10-8       9.21µs ± 9%    9.08µs ± 8%     ~     (p=0.250 n=15+15)
SendRecv/msgsize=100-8      6.51µs ± 9%    6.60µs ± 7%     ~     (p=0.259 n=15+13)
SendRecv/msgsize=1000-8     7.24µs ±13%    7.61µs ±36%     ~     (p=1.000 n=11+15)
SendRecv/msgsize=10000-8    19.5µs ±15%    19.9µs ±25%     ~     (p=0.890 n=14+15)

name                      old speed      new speed      delta
SendRecv/msgsize=10-8     1.09MB/s ± 8%  1.10MB/s ± 8%     ~     (p=0.286 n=15+15)
SendRecv/msgsize=100-8    15.4MB/s ± 8%  15.1MB/s ± 6%     ~     (p=0.129 n=15+12)
SendRecv/msgsize=1000-8    139MB/s ±15%   135MB/s ±28%     ~     (p=1.000 n=11+15)
SendRecv/msgsize=10000-8   516MB/s ±17%   506MB/s ±21%     ~     (p=0.880 n=14+15)

name                      old alloc/op   new alloc/op   delta
SendRecv/msgsize=10-8         170B ± 1%      108B ± 1%  -36.63%  (p=0.000 n=15+15)
SendRecv/msgsize=100-8        265B ± 1%      203B ± 1%  -23.34%  (p=0.000 n=15+15)
SendRecv/msgsize=1000-8     1.18kB ± 1%    1.12kB ± 0%   -5.31%  (p=0.000 n=14+14)
SendRecv/msgsize=10000-8    18.8kB ± 2%    18.8kB ± 2%     ~     (p=0.443 n=12+12)

name                      old allocs/op  new allocs/op  delta
SendRecv/msgsize=10-8         4.00 ± 0%      2.00 ± 0%  -50.00%  (p=0.000 n=15+15)
SendRecv/msgsize=100-8        4.00 ± 0%      2.00 ± 0%  -50.00%  (p=0.000 n=15+15)
SendRecv/msgsize=1000-8       4.00 ± 0%      2.00 ± 0%  -50.00%  (p=0.000 n=15+15)
SendRecv/msgsize=10000-8      5.00 ± 0%      3.00 ± 0%  -40.00%  (p=0.000 n=13+14)

Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
 2020-08-12 15:15:58 -07:00
Brad Fitzpatrick
b983e5340f wgengine/monitor: add, clean up netlink logging on route changes 
Updates #643
 2020-08-12 13:27:14 -07:00
Mike Kramlich
6fa7a9a055 wgengine/router/router_userspace_bsd: on Mac the route program syntax expects delete not del -- this had caused router reconfig to fail in some cases. Fixes #673 
Signed-off-by: Mike Kramlich <groglogic@gmail.com>
 2020-08-12 13:22:19 -07:00
Dmytro Shynkevych
95a18f815c
router/dns: detect host endianness for NetworkManager. 
Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
 2020-08-12 16:13:05 -04:00
Brad Fitzpatrick
b97aac1718 net/interfaces: include DefaultRouteInterface in interfaces.State 
And log it in wgengine on change. Changing bug in #643.

Updates #643
 2020-08-12 12:48:34 -07:00
Brad Fitzpatrick
75225368a4 derp: fix 32-bit struct field alignment 2020-08-11 13:50:16 -07:00
David Anderson
15949ad77d derp: export the new expvar. 2020-08-11 19:59:08 +00:00
David Anderson
13661e195a derp: rename "wireguard" packet type to "other". 
Strictly speaking, we don't know that it's a wireguard packet, just that
it doesn't look like a disco packet.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2020-08-11 19:30:39 +00:00
David Anderson
1b5b59231b derp: break down received packets by kind (disco vs. wireguard). 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2020-08-11 19:16:28 +00:00
David Anderson
c2b63ba363 cmd/microproxy: add a quick hack for some malformed variables. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2020-08-11 17:22:45 +00:00
Brad Fitzpatrick
5a0c37aafd logpolicy: consider /var/lib/tailscale when no STATE_DIRECTORY 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-10 20:44:32 -07:00
Brad Fitzpatrick
1f7a7a4ffe tailcfg: add missing Node.DERP check in Node.Equals 
Updates tailscale/corp#549

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-10 19:46:22 -07:00
Brad Fitzpatrick
4e63a4fda3 cmd/tailscale/cli: remove already done TODO 2020-08-10 19:41:39 -07:00
Josh Bleecher Snyder
a9b1e3f9e8 net/interfaces: remove old debug old 
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2020-08-10 14:28:16 -07:00
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>
 2020-08-10 14:15:37 -07:00
Josh Bleecher Snyder
355c6296f0 derp: add readUint32 and writeUint32 benchmarks 
These aren't particularly performance critical,
but since I have an optimization pending for them,
it's worth having a corresponding benchmark.

Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
 2020-08-10 14:15:37 -07:00
Brad Fitzpatrick
25b021388b net/netns, net/interfaces: move defaultRouteInterface, add Android fallback 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-10 13:02:47 -07:00
Brad Fitzpatrick
84dc891843 cmd/tailscale/cli: add ping subcommand 
For example:

$ tailscale ping -h
USAGE
  ping <hostname-or-IP>

FLAGS
  -c 10                   max number of pings to send
  -stop-once-direct true  stop once a direct path is established
  -verbose false          verbose output

$ tailscale ping mon.ts.tailscale.com
pong from monitoring (100.88.178.64) via DERP(sfo) in 65ms
pong from monitoring (100.88.178.64) via DERP(sfo) in 252ms
pong from monitoring (100.88.178.64) via [2604:a880:2:d1::36:d001]:41641 in 33ms

Fixes #661

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-10 12:50:56 -07:00
Josh Bleecher Snyder
d65e2632ab derp: add basic benchmark 
This benchmark is far from perfect: It mixes together
client and server. Still, it provides a starting point
for easy profiling.

Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com>
 2020-08-10 09:58:34 -07:00
Brad Fitzpatrick
87cbc067c2 cmd/tailscale/cli: validate advertised routes' IP address-vs-network bits 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-10 09:16:49 -07:00
Brad Fitzpatrick
a275b9d7aa control/controlclient: use less battery when stopped, stop map requests 
Updates #604

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-09 09:36:35 -07:00
Brad Fitzpatrick
dd97111d06 backoff: update to Go style, document a bit, make 30s explicit 
Also, bit of behavior change: on non-nil err but expired context,
don't reset the consecutive failure count. I don't think the old
behavior was intentional.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-09 09:36:26 -07:00
Brad Fitzpatrick
696020227c tailcfg, control/controlclient: support delta-encoded netmaps 
Should greatly reduce bandwidth for large networks (including our
hello.ipn.dev node).

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-07 21:49:49 -07:00
Josh Bleecher Snyder
b23f2263c1 derp: add server version to /debug, expvars 
This will make it easier for a human to tell what
version is deployed, for (say) correlating line numbers
in profiles or panics to corresponding source code.

It'll also let us observe version changes in prometheus.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2020-08-07 12:46:02 -07:00
Brad Fitzpatrick
c64a43a734 wgengine/router: set MTU on Windows to min(configured,possible) 
Fixes tailscale/corp#542

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-07 12:16:12 -07:00
Brad Fitzpatrick
9318b4758c README: update contributing section 2020-08-07 08:28:56 -07:00
Brad Fitzpatrick
6818bb843d Update README, remove old relaynode dredge 2020-08-07 08:25:25 -07:00
Brad Fitzpatrick
24f78eff62 version: new week, new date 2020-08-06 21:30:59 -07:00
Brad Fitzpatrick
5590daa97d control/controlclient: reset timeout timer on non-keepalive map updates 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-08-06 21:30:17 -07:00
Brad Fitzpatrick
b840e7dd5b go mod tidy 2020-08-06 21:24:09 -07:00
Josh Bleecher Snyder
1b27eb431a go.mod: update to newly rebased wireguard-go 2020-08-06 17:50:31 -07:00
Josh Bleecher Snyder
2622e8e082 wgenginer/router: fix build 
Rebasing github.com/tailscale/wireguard-go to upstream
wireguard-go changed the API.

This commit is analogous to
https://git.zx2c4.com/wireguard-windows/commit/?id=6823cc10ffe193c0cb1d61a5d1828d563d3d0e5f
 2020-08-06 17:37:05 -07:00
Brad Fitzpatrick
b62b07bc2d ipn: jack up the MaxMessageSize from 1MB to 10MB 
hello.ipn.dev has a 2.5MB network map
 2020-08-06 15:42:23 -07:00
Dmytro Shynkevych
cb01058a53
wgengine: stop giving tsdns a buffer that will be reused 
Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
 2020-08-06 18:11:50 -04:00
Brad Fitzpatrick
9a346fd8b4 wgengine,magicsock: fix two lazy wireguard config issues 
1) we weren't waking up a discoEndpoint that once existed and
   went idle for 5 minutes and then got a disco message again.

2) userspaceEngine.noteReceiveActivity had a buggy check; fixed
   and added a test
 2020-08-06 15:02:29 -07:00
Dmytro Shynkevych
78c2e1ff83
tsdns: implement reverse DNS lookups, canonicalize names everywhere. (#640) 
Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
 2020-08-06 14:25:28 -04:00