Commit Graph

492 Commits (9d4ffd135fb165abf7d9c9393ff73590f1771800)

Author SHA1 Message Date
Josh Bleecher Snyder 1b57b0380d wgengine/magicsock: remove final alloc from ReceiveFrom
And now that we don't have to play escape analysis and inlining games,
simplify the code.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 08cf54f386 wgengine/magicsock: fix goMajorVersion for 1.18 ts release
The version string changed slightly. Adapt.
And always check the current Go version to prevent future
accidental regressions. I would have missed this one had
I not explicitly manually checked it.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Maisem Ali 72d8672ef7 tailcfg: make Node.Hostinfo a HostinfoView
Signed-off-by: Maisem Ali <maisem@tailscale.com>
3 years ago
Brad Fitzpatrick 2db6cd1025 ipn/ipnlocal, wgengine/magicsock, logpolicy: quiet more logs
Updates #1548

Change-Id: Ied169f872e93be2857890211f2e018307d4aeadc
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 730aa1c89c derp/derphttp, wgengine/magicsock: prefer IPv6 to DERPs when IPv6 works
Fixes #3838

Change-Id: Ie47a2a30c7e8e431512824798d2355006d72fb6a
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
David Anderson 7a18fe3dca wgengine/magicsock: make debugUseDerpRoute an opt.Bool.
Can still be constant, just needs the extra methods.

Fixes #3812

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
Brad Fitzpatrick 41fd4eab5c envknob: add new package for all the strconv.ParseBool(os.Getenv(..))
A new package can also later record/report which knobs are checked and
set. It also makes the code cleaner & easier to grep for env knobs.

Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Josh Bleecher Snyder de4696da10 wgengine/magicsock: fix deadlock on shutdown
This fixes a deadlock on shutdown.
One goroutine is waiting to send on c.derpRecvCh before unlocking c.mu.
The other goroutine is waiting to lock c.mu before receiving from c.derpRecvCh.

#3736 has a more detailed explanation of the sequence of events.

Fixes #3736

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Brad Fitzpatrick 5404a0557b wgengine/magicsock: remove a per-DERP-packet map lookup in common case
Updates #150

Change-Id: Iffb6eccbe7ca97af97d29be63b7e37d487b3ba28
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 5a317d312d wgengine/magicsock: enable DERP Return Path Optimization (DRPO)
Turning this on at the beginning of the 1.21.x dev cycle, for 1.22.

Updates #150

Change-Id: I1de567cfe0be3df5227087de196ab88e60c9eb56
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick c6c39930cc wgengine/magicsock: fix lock ordering deadlock with derphttp
Fixes #3726

Change-Id: I32631a44dcc1da3ae47764728ec11ace1c78190d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick addda5b96f wgengine/magicsock: fix watchdog timeout on Close when IPv6 not available
The blockForeverConn was only using its sync.Cond one side. Looks like it
was just forgotten.

Fixes #3671

Change-Id: I4ed0191982cdd0bfd451f133139428a4fa48238c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 28bf53f502 wgengine/magicsock: reduce disco ping heartbeat aggressiveness a bit
Bigger changes coming later, but this should improve things a bit in
the meantime.

Rationale:

* 2 minutes -> 45 seconds: 2 minutes was overkill and never considered
  phones/battery at the time. It was totally arbitrary. 45 seconds is
  also arbitrary but is less than 2 minutes.

* heartbeat from 2 seconds to 3 seconds: in practice this meant two
  packets per second (2 pings and 2 pongs every 2 seconds) because the
  other side was also pinging us every 2 seconds on their own.
  That's just overkill. (see #540 too)

So in the worst case before: when we sent a single packet (say: a DNS
packet), we ended up sending 61 packets over 2 minutes: the 1 DNS
query and then then 60 disco pings (2 minutes / 2 seconds) & received
the same (1 DNS response + 60 pongs).  Now it's 15. In 1.22 we plan to
remove this whole timer-based heartbeat mechanism entirely.

The 5 seconds to 6.5 seconds change is just stretching out that
interval so you can still miss two heartbeats (other 3 + 3 seconds
would be greater than 5 seconds). This means that if your peer moves
without telling you, you can have a path out for 6.5 seconds
now instead of 5 seconds before disco finds a new one. That will also
improve in 1.22 when we start doing UDP+DERP at the same time
when confidence starts to go down on a UDP path.

Updates #3363

Change-Id: Ic2314bbdaf42edcdd7103014b775db9cf4facb47
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick a201b89e4a wgengine/magicsock: reconnect to DERP when its definition changes
Change-Id: I7c560feb9e4a6e155a35ec764a68354f19f694e4
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 7d9b1de3aa netcheck,portmapper,magicsock: ignore some UDP write errors on Linux
Treat UDP send EPERM errors as a lost UDP packet, not something super
fatal. That's just the Linux firewall preventing it from going out.

And add a leaf package net/neterror for that (and future) policy that
all three packages can share, with tests.

Updates #3619

Change-Id: Ibdb838c43ee9efe70f4f25f7fc7fdf4607ba9c1d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 2c94e3c4ad wgengine/magicsock: don't unconditionally close DERP connections on rebind
Only if the source address isn't on the currently active interface or
a ping of the DERP server fails.

Updates #3619

Change-Id: I6bf06503cff4d781f518b437c8744ac29577acc8
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick ae319b4636 wgengine/magicsock: add HTML debug handler to see magicsock state
Change-Id: Ibc46f4e9651e1c86ec6f5d139f5e9bdc7a488415
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick c7f5bc0f69 wgengine/magicsock: add metrics for sent disco messages
We only tracked the transport type (UDP vs DERP), not what they were.

Change-Id: Ia4430c1c53afd4634e2d9893d96751a885d77955
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 486059589b all: gofmt -w -s (simplify) tests
And it updates the build tag style on a couple files.

Change-Id: I84478d822c8de3f84b56fa1176c99d2ea5083237
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 7b9c7bc42b ipn/ipnstate: remove old deprecated TailAddr IPv4-only field
It's been a bunch of releases now since the TailscaleIPs slice
replacement was added.

Change-Id: I3bd80e1466b3d9e4a4ac5bedba8b4d3d3e430a03
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
David Anderson 33c541ae30 ipn/ipnlocal: populate self status from netmap in ipnlocal, not magicsock.
Fixes #1933

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
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>
3 years ago
Brad Fitzpatrick 8ec44d0d5f wgengine/magicsock: remove some log spam
Fixes tailscale/corp#3070

Change-Id: Ie50031800ec8669e0596ad6d59d1e329a5c88516
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
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>
3 years ago
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>
3 years ago
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>
3 years ago
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>
3 years ago
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>
3 years ago
Josh Bleecher Snyder 16870cb754 wgengine/magicsock: fix typo in comment
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
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>
3 years ago
Brad Fitzpatrick 24ea365d48 netcheck, controlclient, magicsock: add more metrics
Updates #3307

Change-Id: Ibb33425764a75bde49230632f1b472f923551126
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
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>
3 years ago
David Anderson 0532eb30db all: replace tailcfg.DiscoKey with key.DiscoPublic.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 7e6a1ef4f1 tailcfg: use key.NodePublic in wire protocol types.
Updates #3206.

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 72ace0acba wgengine/magicsock: use key.NodePublic instead of tailcfg.NodeKey.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson d6e7cec6a7 types/netmap: use key.NodePublic instead of tailcfg.NodeKey.
Update #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 84c3a09a8d types/key: export constants for key size, not a method.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 6422789ea0 disco: use key.NodePublic instead of tailcfg.NodeKey.
Updates #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 418adae379 various: use NodePublic.AsNodeKey() instead of tailcfg.NodeKeyFromNodePublic()
Updates #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson eeb97fd89f various: remove remaining uses of key.NewPrivate.
Updates #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson ef241f782e wgengine/magicsock: remove uses of tailcfg.DiscoKey.
Updates #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 55b6753c11 wgengine/magicsock: remove use of key.{Public,Private}.
Updates #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson c1d009b9e9 ipn/ipnstate: use key.NodePublic instead of the generic key.Public.
Updates #3206.

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 37c150aee1 derp: use new node key type.
Update #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson e03fda7ae6 wgengine/magicsock: remove test uses of wgkey.
Updates #3206

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
Josh Bleecher Snyder 94fb42d4b2 all: use testingutil.MinAllocsPerRun
There are a few remaining uses of testing.AllocsPerRun:
Two in which we only log the number of allocations,
and one in which dynamically calculate the allocations
target based on a different AllocsPerRun run.

This also allows us to tighten the "no allocs"
test in wgengine/filter.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 1df865a580 wgengine/magicsock: allow even fewer allocs per UDP receive
We improved things again for Go 1.18. Lock that in.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder c1d377078d wgengine/magicsock: use testingutil.MinAllocsPerRun
This speeds up and deflakes the test.

Fixes #2826 (again)

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
David Anderson c9bf773312 wgengine/magicsock: replace use of wgkey with new node key type.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 6e5175373e types/netmap: use new node key type.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago