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78 Commits

Author SHA1 Message Date
Josh Bleecher Snyder
c4895658e6 device: avoid copying lock in tests 
This doesn't cause any practical problems as it is,
but vet (rightly) flags this code as copying a mutex.
It is easy to fix, so do so.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2020-12-08 14:25:10 -08:00
Josh Bleecher Snyder
d3ff2d6b62 device: clear pointers when returning elems to pools 
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2020-12-08 14:25:02 -08:00
Josh Bleecher Snyder
01d3aaa7f4 device: use labeled for loop instead of goto 
Minor code cleanup; no functional changes.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2020-12-08 14:24:20 -08:00
Jason A. Donenfeld
da19db415a version: bump snapshot 2020-11-18 14:24:17 +01:00
Haichao Liu
913f68ce38 device: add write queue mutex for peer 
fix panic: send on closed channel when remove peer

Signed-off-by: Haichao Liu <liuhaichao@bytedance.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-11-18 14:22:15 +01:00
Jason A. Donenfeld
5ca1218a5c device: format a few things 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-11-06 18:01:27 +01:00
Riobard Zhan
2c143dce0f replay: minor API changes to more idiomatic Go 
Signed-off-by: Riobard Zhan <me@riobard.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-10-14 10:46:00 +02:00
Jason A. Donenfeld
c8fe925020 device: remove global for roaming escape hatch 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-10-14 10:45:31 +02:00
Sina Siadat
bc3f505efa device: get free port when testing 
Signed-off-by: Sina Siadat <siadat@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-07-31 16:18:53 +02:00
David Crawshaw
507f148e1c device: remove bindsocketshim.go 
Both wireguard-windows and wireguard-android access Bind
directly for these methods now.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-07-14 23:18:53 -06:00
Brad Fitzpatrick
31b574ef99 device: remove some unnecessary unsafe 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-07-15 06:59:44 +10:00
Tobias Klauser
3c41141fb4 device: use RTMGRP_IPV4_ROUTE to specify multicast groups mask 
Use the RTMGRP_IPV4_ROUTE const from x/sys/unix instead of using the
corresponding RTNLGRP_IPV4_ROUTE const to create the multicast groups
mask.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-07-13 17:58:10 -06:00
Dmytro Shynkevych
4369db522b device: wait for routines to stop before removing peers 
Peers are currently removed after Device's goroutines are signaled to stop,
but without waiting for them to actually do so, which is racy.

For example, RoutineHandshake may be in Peer.SendKeepalive
when the corresponding peer is removed, which closes its nonce channel.
This causes a send on a closed channel, as observed in tailscale/tailscale#487.

This patch seems to be the correct synchronizing action:
Peer's goroutines are receivers and handle channel closure gracefully,
so Device's goroutines are the ones that should be fully stopped first.

Signed-Off-By: Dmytro Shynkevych <dmytro@tailscale.com>
 2020-07-04 20:29:31 +10:00
David Crawshaw
b84f1d4db2 device: export Bind and remove socketfd shims for android 
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-06-22 10:42:28 +10:00
Jason A. Donenfeld
f28a6d244b device: do not include sticky sockets on android 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-06-07 01:50:20 -06:00
Jason A. Donenfeld
c403da6a39 conn: unbreak boundif on android 
Another thing never tested ever.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-06-07 01:48:28 -06:00
Jason A. Donenfeld
59e556f24e conn: fix windows situation with boundif 
This was evidently never tested before committing.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-06-07 01:26:25 -06:00
Jason A. Donenfeld
31faf4c159 replay: account for fqcodel reordering 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-05-19 17:46:35 -06:00
Jason A. Donenfeld
99eb7896be device: rework padding calculation and don't shadow paddedSize 
Reported-by: Jayakumar S <jayakumar82.s@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-05-18 15:43:22 -06:00
Jason A. Donenfeld
db0aa39b76 global: update header comments and modules 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-05-02 02:08:26 -06:00
Jason A. Donenfeld
28c4d04304 device: use atomic access for unlocked keypair.next 
Go's GC semantics might not always guarantee the safety of this, and the
race detector gets upset too, so instead we wrap this all in atomic
accessors.

Reported-by: David Anderson <danderson@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-05-02 01:56:48 -06:00
Avery Pennarun
d60857e1a7 device: add debug logs describing handshake rejection 
Useful in testing when bad network stacks repeat or
batch large numbers of packets.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
 2020-05-02 01:50:47 -06:00
David Anderson
f2c6faad44 device: return generic error from Ipc{Get,Set}Operation. 
This makes uapi.go's public API conform to Go style in terms
of error types.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2020-05-02 01:49:47 -06:00
David Crawshaw
de374bfb44 device: give handshake state a type 
And unexport handshake constants.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-05-02 01:46:42 -06:00
David Crawshaw
1a1c3d0968 tuntest: split out testing package 
This code is useful to other packages writing tests.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-05-02 01:46:42 -06:00
David Crawshaw
203554620d conn: introduce new package that splits out the Bind and Endpoint types 
The sticky socket code stays in the device package for now,
as it reaches deeply into the peer list.

This is the first step in an effort to split some code out of
the very busy device package.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-05-02 01:46:42 -06:00
David Anderson
3dce460c88 device: add test to ensure Peer fields are safe for atomic access on 32-bit 
Adds a test that will fail consistently on 32-bit platforms if the
struct ever changes again to violate the rules. This is likely not
needed because unaligned access crashes reliably, but this will reliably
fail even if tests accidentally pass due to lucky alignment.

Signed-Off-By: David Anderson <danderson@tailscale.com>
 2020-05-02 01:44:58 -06:00
Jason A. Donenfeld
ae88e2a2cd version: bump snapshot 2020-03-20 12:00:53 -06:00
Jason A. Donenfeld
4739708ca4 noise: unify zero checking of ecdh 2020-03-17 23:07:14 -06:00
Tobias Klauser
b33219c2cf global: use RTMGRP_* consts from x/sys/unix 
Update the golang.org/x/sys/unix dependency and use the newly introduced
RTMGRP_* consts instead of using the corresponding RTNLGRP_* const to
create a mask.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
 2020-03-17 23:07:11 -06:00
Jason A. Donenfeld
9cbcff10dd send: account for zero mtu 
Don't divide by zero.
 2020-02-14 18:53:55 +01:00
Jason A. Donenfeld
6ed56ff2df device: fix private key removal logic 2020-02-04 22:02:53 +01:00
Jason A. Donenfeld
cb4bb63030 uapi: allow unsetting device private key with /dev/null 2020-02-04 22:02:53 +01:00
Jason A. Donenfeld
05b03c6750 version: bump snapshot 2020-01-21 16:27:19 +01:00
Jason A. Donenfeld
89dd065e53 README: update repo urls 2019-12-30 11:53:39 +01:00
Jason A. Donenfeld
ddfad453cf device: SendmsgN mutates the input sockaddr 
So we take a new granular lock to prevent concurrent writes from
racing.

WARNING: DATA RACE
Write at 0x00c0011f2740 by goroutine 27:
  golang.org/x/sys/unix.(*SockaddrInet4).sockaddr()
      /go/pkg/mod/golang.org/x/sys@v0.0.0-20191105231009-c1f44814a5cd/unix/syscall_linux.go:384
+0x114
  golang.org/x/sys/unix.SendmsgN()
      /go/pkg/mod/golang.org/x/sys@v0.0.0-20191105231009-c1f44814a5cd/unix/syscall_linux.go:1304
+0x288
  golang.zx2c4.com/wireguard/device.send4()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/conn_linux.go:485
+0x11f
  golang.zx2c4.com/wireguard/device.(*nativeBind).Send()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/conn_linux.go:268
+0x1d6
  golang.zx2c4.com/wireguard/device.(*Peer).SendBuffer()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/peer.go:151
+0x285
  golang.zx2c4.com/wireguard/device.(*Peer).SendHandshakeInitiation()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/send.go:163
+0x692
  golang.zx2c4.com/wireguard/device.(*Device).RoutineReadFromTUN()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/send.go:318
+0x4b8

Previous write at 0x00c0011f2740 by goroutine 386:
  golang.org/x/sys/unix.(*SockaddrInet4).sockaddr()
      /go/pkg/mod/golang.org/x/sys@v0.0.0-20191105231009-c1f44814a5cd/unix/syscall_linux.go:384
+0x114
  golang.org/x/sys/unix.SendmsgN()
      /go/pkg/mod/golang.org/x/sys@v0.0.0-20191105231009-c1f44814a5cd/unix/syscall_linux.go:1304
+0x288
  golang.zx2c4.com/wireguard/device.send4()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/conn_linux.go:485
+0x11f
  golang.zx2c4.com/wireguard/device.(*nativeBind).Send()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/conn_linux.go:268
+0x1d6
  golang.zx2c4.com/wireguard/device.(*Peer).SendBuffer()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/peer.go:151
+0x285
  golang.zx2c4.com/wireguard/device.(*Peer).SendHandshakeInitiation()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/send.go:163
+0x692
  golang.zx2c4.com/wireguard/device.expiredRetransmitHandshake()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/timers.go:110
+0x40c
  golang.zx2c4.com/wireguard/device.(*Peer).NewTimer.func1()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/timers.go:42
+0xd8

Goroutine 27 (running) created at:
  golang.zx2c4.com/wireguard/device.NewDevice()
      /go/pkg/mod/golang.zx2c4.com/wireguard@v0.0.20191012/device/device.go:322
+0x5e8
  main.main()
      /go/src/x/main.go:102 +0x58e

Goroutine 386 (finished) created at:
  time.goFunc()
      /usr/local/go/src/time/sleep.go:168 +0x51

Reported-by: Ben Burkert <ben@benburkert.com>
 2019-11-28 11:11:13 +01:00
Jason A. Donenfeld
4cdf805b29 constants: recalculate rekey max based on a one minute flood 
Discussed-with: Mathias Hall-Andersen <mathias@hall-andersen.dk>
 2019-10-30 14:29:32 +01:00
Jonathan Tooker
f7d0edd2ec global: fix a few typos courtesy of codespell 
Signed-off-by: Jonathan Tooker <jonathan.tooker@netprotect.com>
 2019-10-22 11:51:25 +02:00
Jason A. Donenfeld
ffffbbcc8a device: allow blackholing sockets 2019-10-21 13:29:57 +02:00
Jason A. Donenfeld
47b02c618b device: remove dead error reporting code 2019-10-21 11:46:54 +02:00
Jason A. Donenfeld
ae492d1b35 device: recheck counters while holding write lock 2019-10-17 15:43:06 +02:00
David Crawshaw
540d01e54a device: test packets between two fake devices 
Signed-off-by: David Crawshaw <crawshaw@tailscale.io>
 2019-10-16 11:38:28 +02:00
Jason A. Donenfeld
f2ea85e9f9 version: bump snapshot 2019-10-12 22:34:10 +02:00
Jason A. Donenfeld
f2501aa6c8 uapi: allow preventing creation of new peers when updating 
This enables race-free updates for wg-dynamic and similar tools.

Suggested-by: Thomas Gschwantner <tharre3@gmail.com>
 2019-10-04 11:41:02 +02:00
Jason A. Donenfeld
7c97fdb1e3 version: bump snapshot 2019-09-08 10:56:55 -05:00
Jason A. Donenfeld
f8198c0428 device: getsockname on linux to determine port 
It turns out Go isn't passing the pointer properly so we wound up with a
zero port every time.
 2019-08-25 12:45:13 -06:00
Jason A. Donenfeld
b16dba47a7 version: bump snapshot 2019-08-05 19:29:12 +02:00
Jason A. Donenfeld
4be9630ddc device: drop lock before expiring keys 2019-08-05 17:46:34 +02:00
Jason A. Donenfeld
4e3018a967 uapi: skip peers with invalid keys 2019-08-05 16:57:41 +02:00
Jason A. Donenfeld
7bc0e11831 device: do not crash on nil'd bind in windows binding 2019-07-18 19:34:45 +02:00