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Brad Fitzpatrick
0350cf0438 wgengine{,/router}: annotate some more errors 
Updates #3351

Change-Id: I8b4f957d2051b3e29401bb449dbadbdada3a7c46
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-19 10:46:01 -08:00
Brad Fitzpatrick
5294125e7a cmd/tailscaled: disambiguate some startup failure error messages 
Updates #3351

Change-Id: I0afead4a084623567f56b19187574fa97b295b2a
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-19 08:58:29 -08:00
Josh Bleecher Snyder
758c37b83d net/netns: thread logf into control functions 
So that darwin can log there without panicking during tests.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-18 15:09:51 -08:00
Josh Bleecher Snyder
85184a58ed wgengine/wgcfg: recover from mismatched PublicKey/Endpoints 
In rare circumstances (tailscale/corp#3016), the PublicKey
and Endpoints can diverge.

This by itself doesn't cause any harm, but our early exit
in response did, because it prevented us from recovering from it.

Remove the early exit.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-18 14:28:41 -08:00
Denton Gentry
9fc4e876e3 VERSION.txt: this is v1.19.0 
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
 2021-11-18 12:12:48 -08:00
Brad Fitzpatrick
8ec44d0d5f wgengine/magicsock: remove some log spam 
Fixes tailscale/corp#3070

Change-Id: Ie50031800ec8669e0596ad6d59d1e329a5c88516
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-18 11:01:51 -08:00
Brad Fitzpatrick
61d0435ed9 wgengine/monitor: reduce Windows log spam 
Fixes #3345

Change-Id: Icde9c92f88f98bb3b030d39b0424a7d389bceb88
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-18 10:57:27 -08:00
Brad Fitzpatrick
0653efb092 cmd/tailscaled: remove a redundant date prefix on Windows logs 
Change-Id: I28e122d4384697f51a748d67829409276c00b11e
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-18 10:23:41 -08:00
Brad Fitzpatrick
49a3fcae78 log/filelogger: make filelogger remove redundant date before adding a date 
At some point since filelogger was added on Windows, the log hierarchy
above it changed such that a log.Printf writes to filelogger and includes
the log package's own date. But then filelogger adds another.

Rather than debug everything above and risk removing the prefix when
run by tailscaled, instead just remove the log package's prefix
very late right before we go to add the filelogger's own.

Change-Id: I9db518f42c603ef83017f74827270f124fdf5c14
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-18 10:23:41 -08:00
Brad Fitzpatrick
4a59a2781a ipn/ipnlocal: export client metrics over peerapi to owner 
Updates #3307

Change-Id: I41b1f3c16af5f385575e8d6cea70ae8386504dd8
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-18 08:04:00 -08:00
Brad Fitzpatrick
d24ed3f68e wgengine/router: add debug knob to resort to Linux "ip" command usage 
Tailscale 1.18 uses netlink instead of the "ip" command to program the
Linux kernel.

The old way was kept primarily for tests, but this also adds a
TS_DEBUG_USE_IP_COMMAND environment knob to force the old way
temporarily for debugging anybody who might have problems with the
new way in 1.18.

Updates #391

Change-Id: I0236fbfda6c9c05dcb3554fcc27ec0c86456efd9
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-18 08:01:22 -08:00
Josh Bleecher Snyder
b3d6704aa3 wgengine/magicsock: fix data race on endpoint.discoKey 
endpoint.discoKey is protected by endpoint.mu.
endpoint.sendDiscoMessage was reading it without holding the lock.
This showed up in a CI failure and is readily reproducible locally.

The fix is in two parts.

First, for Conn.enqueueCallMeMaybe, eliminate the one-line helper method endpoint.sendDiscoMessage; call Conn.sendDiscoMessage directly.
This makes it more natural to read endpoint.discoKey in a context
in which endpoint.mu is already held.

Second, for endpoint.sendDiscoPing, explicitly pass the disco key
as an argument. Again, this makes it easier to read endpoint.discoKey
in a context in which endpoint.mu is already held.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-17 17:49:33 -08:00
Brad Fitzpatrick
cf06f9df37 net/tstun, wgengine: add packet-level and drop metrics 
Primarily tstun work, but some MagicDNS stuff spread into wgengine.

No wireguard reconfig metrics (yet).

Updates #3307

Change-Id: Ide768848d7b7d0591e558f118b553013d1ec94ad
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-17 16:18:52 -08:00
Brad Fitzpatrick
ec036b3561 logpolicy: use bootstrap DNS for logtail dialer 
Fixes #3332

Change-Id: Ie45efb448e5508c3ece48dd1d8d7e9a39e2e9dc1
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-17 14:37:43 -08:00
Brad Fitzpatrick
7901289578 wgengine/magicsock: add a stress test 
And add a peerMap validate method that checks its internal invariants.

Updates tailscale/corp#3016

Change-Id: I23708e68ed44d81986d9e2be82029d4555547592
Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-17 14:37:28 -08:00
Josh Bleecher Snyder
5a60781919 wgengine/magicsock: increase TestDiscokeyChange connection timeout 
I believe that this should eliminate the flakiness.
If GitHub CI manages to be even slower that can be believed
(and I can believe a lot at this point),
then we should roll this back and make some more invasive changes.

Updates #654
Fixes #3247 (I hope)

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-17 14:13:58 -08:00
Brad Fitzpatrick
5b5f032c9a util/clientmetric: optimize memory layout for finding updates 
Updates #3307

Change-Id: I2840b190583467cc3f00688b96ce3d170df46a46
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-17 12:30:49 -08:00
Josh Bleecher Snyder
773af7292b wgengine/magicsock: simplify peerMap.upsertEndpoint 
We can do the "maybe delete" check unilaterally:
In the case of an insert, both oldDiscoKey
and ep.discoKey will be the zero value.

And since we don't use pi again, we can skip
giving it a name, which makes scoping clearer.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-16 15:15:49 -08:00
Josh Bleecher Snyder
9da22dac3d wgengine/magicsock: fix bug in peerMap.upsertEndpoint 
Found by inspection by David Crawshaw while
investigating tailscale/corp#3016.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-16 15:15:49 -08:00
Josh Bleecher Snyder
16870cb754 wgengine/magicsock: fix typo in comment 
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-16 15:15:49 -08:00
Brad Fitzpatrick
36b1df1241 cmd/tailscale/cli: add --watch flag to "debug metrics" subcommand 
This adds a new --watch flag that prints out a block of metric changes
every second, if anything changed.

Example output:

magicsock_disco_recv_ping    +1 => 254
magicsock_disco_recv_pong    +1 => 218
magicsock_disco_recv_udp     +2 => 472
magicsock_disco_send_udp     +2 => 536
magicsock_disco_sent_udp     +2 => 536
magicsock_recv_data_ipv6     +1 => 82
magicsock_send_data          +1 => 86
magicsock_send_udp           +3 => 620

magicsock_recv_data_ipv6    +1 => 83
magicsock_send_data         +1 => 87
magicsock_send_udp          +1 => 621

magicsock_disco_recv_ping    +1 => 255
magicsock_disco_recv_pong    +1 => 219
magicsock_disco_recv_udp     +2 => 474
magicsock_disco_send_udp     +2 => 538
magicsock_disco_sent_udp     +2 => 538
magicsock_recv_data_ipv6     +1 => 84
magicsock_send_data          +1 => 88
magicsock_send_udp           +3 => 624

magicsock_recv_data_ipv6    +1 => 85
magicsock_send_data         +1 => 89
magicsock_send_udp          +1 => 625

controlclient_map_response_map          +1 => 207
controlclient_map_response_map_delta    +1 => 204
controlclient_map_response_message      +1 => 275
magicsock_disco_recv_ping               +3 => 258
magicsock_disco_recv_pong               +2 => 221
magicsock_disco_recv_udp                +5 => 479
magicsock_disco_send_derp               +1 => 6
magicsock_disco_send_udp                +7 => 545
magicsock_disco_sent_derp               +1 => 6
magicsock_disco_sent_udp                +7 => 545
magicsock_recv_data_ipv6                +1 => 86
magicsock_send_data                     +1 => 90
magicsock_send_derp                     +1 => 12
magicsock_send_derp_queued              +1 => 12
magicsock_send_udp                      +8 => 633

Updates #3307

Change-Id: I5ac2511e3ad24fa1e6ea958c3946fecebe4f79a7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-16 13:48:21 -08:00
David Anderson
41da7620af go.mod: update wireguard-go to pick up roaming toggle 
wgengine/wgcfg: introduce wgcfg.NewDevice helper to disable roaming
at all call sites (one real plus several tests).

Fixes tailscale/corp#3016.

Signed-off-by: David Anderson <danderson@tailscale.com>
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-11-16 13:15:04 -08:00
Brad Fitzpatrick
400ed799e6 net/dns: work around old systemd-resolved setLinkDomain length limit 
Don't set all the *.arpa. reverse DNS lookup domains if systemd-resolved
is old and can't handle them.

Fixes #3188

Change-Id: I283f8ce174daa8f0a972ac7bfafb6ff393dde41d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-16 12:54:21 -08:00
Brian Fallik
9fa6cdf7bf fix minor typo 
Signed-off-by: Brian Fallik <bfallik@gmail.com>
 2021-11-16 11:03:43 -08:00
Brad Fitzpatrick
24ea365d48 netcheck, controlclient, magicsock: add more metrics 
Updates #3307

Change-Id: Ibb33425764a75bde49230632f1b472f923551126
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-16 10:48:19 -08:00
Brad Fitzpatrick
3b541c833e util/clientmetric, logtail: log metric changes 
Updates #3307

Change-Id: I1399ebd786f6ff7defe6e11c0eb651144c071574
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-16 08:06:31 -08:00
Brad Fitzpatrick
68917fdb5d cmd/tailscale/cli: add "debug metrics" subcommand 
To let users inspect the tailscaled metrics easily.

Updates #3307

Change-Id: I922126ca0626659948c57de74c6ef62f40ef5f5f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-15 15:13:25 -08:00
Brad Fitzpatrick
945290cc3f cmd/tailscale/cli: migrate hidden debug subcommand to use subcomands 
It was a mess of flags. Use subcommands under "debug" instead.

And document loudly that it's not a stable interface.

Change-Id: Idcc58f6a6cff51f72cb5565aa977ac0cc30c3a03
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-15 15:03:58 -08:00
Brad Fitzpatrick
57b039c51d util/clientmetrics: add new package to add metrics to the client 
And annotate magicsock as a start.

And add localapi and debug handlers with the Prometheus-format
exporter.

Updates #3307

Change-Id: I47c5d535fe54424741df143d052760387248f8d3
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-15 13:46:05 -08:00
David Anderson
c5d572f371 net/dns: correctly handle NetworkManager-managed DNS that points to resolved. 
Fixes #3304

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-15 12:21:25 -08:00
Brad Fitzpatrick
f7da8c77bd tstest/integration/testcontrol: fix data race 
Fix race from 1ec99e99f4

Fixes #3289

Change-Id: I58158d3f82339ac171fb14827c5f158d602327f4
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-11 08:25:16 -08:00
David Anderson
5b94f67956 control/noise: make Conn.readNLocked less surprising. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
a34350ffda control/noise: factor out nonce checking and incrementing into a type. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
d3acd35a90 control/noise: make message headers match the specification. 
Only the initiation message should carry a protocol version, all
others are just type+len.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
a63c4ab378 control/noise: don't panic when handling ciphertext. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
4004b22fe5 control/noise: stop using poly1305 package constants. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
293431aaea control/noise: use key.Machine{Public,Private} as appropriate. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
edb33d65c3 control/noise: don't cache mixer, just rebuild a BLAKE2s each time. 
This should optimize out fine, and readability is preferable to performance
here.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
7e9e72887c control/noise: add singleUseCHP, use it to simplify nonce/key tracking in handshake. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
cf90392174 control/noise: review fixups 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
0b392dbaf7 control/noise: adjust implementation to match revised spec. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
89a68a4c22 control/noise: include the protocol version in the Noise prologue. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
5e005a658f control/noise: fix typo in docstring. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
eabca699ec control/noise: remove allocations in the encrypt and decrypt paths. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
David Anderson
da7544bcc5 control/noise: implement the base transport for the 2021 control protocol. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-11-10 12:13:54 -08:00
Brad Fitzpatrick
3e1daab704 hostinfo, control/controlclient: tell control when Ubuntu has disabled Tailscale's sources 
Fixes #3177
Updates #2500

Change-Id: Iff2a8e27ec7d36a1c210263d6218f20ebed37924
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-10 09:56:58 -08:00
Brad Fitzpatrick
d2ef73ed82 control/controlclient: rename a variable to not shadow a package name 
Change-Id: I1bcb577cb2c47e936d545ad57f308e57399de323
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-10 08:11:29 -08:00
Maisem Ali
d6dde5a1ac ipn/ipnlocal: handle key extensions after key has already expired 
Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2021-11-08 18:15:09 -08:00
Maisem Ali
eccc2ac6ee net/interfaces/windows: update Tailscale interface detection logic to 
account for new wintun naming.

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2021-11-08 07:44:33 -08:00
Brad Fitzpatrick
ad63fc0510 control/controlclient: make js/wasm work with Go 1.18+ 
Updates #3157

Change-Id: I2d67e582842ab3638d720bb5db4701b878ad4473
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-11-07 13:49:55 -08:00