Commit graph

127 commits

Author SHA1 Message Date
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
Jason A. Donenfeld a961aacc9f device: immediately rekey all peers after changing device private key
Reported-by: Derrick Pallas <derrick@pallas.us>
2019-07-11 17:37:35 +02:00
Jason A. Donenfeld f361e59001 device: receive: uniform message for source address check 2019-07-01 15:24:50 +02:00
Jason A. Donenfeld dd8817f50e device: receive: simplify flush loop 2019-07-01 15:23:24 +02:00
Matt Layher 1f48971a80 tun: remove TUN prefix from types to reduce stutter elsewhere
Signed-off-by: Matt Layher <mdlayher@gmail.com>
2019-06-14 18:35:57 +02:00
Jason A. Donenfeld 3371f8dac6 device: update transfer counters correctly
The rule is to always update them to the full packet size minus UDP/IP
encapsulation for all authenticated packet types.
2019-06-11 18:13:52 +02:00
Matt Layher 43a4589043 device: remove redundant return statements
More staticcheck fixes:

$ staticcheck ./... | grep S1023
device/noise-helpers.go:45:2: redundant return statement (S1023)
device/noise-helpers.go:54:2: redundant return statement (S1023)
device/noise-helpers.go:64:2: redundant return statement (S1023)

Signed-off-by: Matt Layher <mdlayher@gmail.com>
2019-06-04 13:01:52 +02:00
Matt Layher 8d76ac8cc4 device: use bytes.Equal for equality check, simplify assertEqual
Signed-off-by: Matt Layher <mdlayher@gmail.com>
2019-06-04 13:01:52 +02:00
Matt Layher 18b6627f33 device, ratelimiter: replace uses of time.Now().Sub() with time.Since()
Simplification found by staticcheck:

$ staticcheck ./... | grep S1012
device/cookie.go:90:5: should use time.Since instead of time.Now().Sub (S1012)
device/cookie.go:127:5: should use time.Since instead of time.Now().Sub (S1012)
device/cookie.go:242:5: should use time.Since instead of time.Now().Sub (S1012)
device/noise-protocol.go:304:13: should use time.Since instead of time.Now().Sub (S1012)
device/receive.go:82:46: should use time.Since instead of time.Now().Sub (S1012)
device/send.go:132:5: should use time.Since instead of time.Now().Sub (S1012)
device/send.go:139:5: should use time.Since instead of time.Now().Sub (S1012)
device/send.go:235:59: should use time.Since instead of time.Now().Sub (S1012)
device/send.go:393:9: should use time.Since instead of time.Now().Sub (S1012)
ratelimiter/ratelimiter.go:79:10: should use time.Since instead of time.Now().Sub (S1012)
ratelimiter/ratelimiter.go:87:10: should use time.Since instead of time.Now().Sub (S1012)

Change applied using:

$ find . -type f -name "*.go" -exec sed -i "s/Now().Sub(/Since(/g" {} \;

Signed-off-by: Matt Layher <mdlayher@gmail.com>
2019-06-03 22:15:41 +02:00
Jason A. Donenfeld d9f995209c device: add SendKeepalivesToPeersWithCurrentKeypair for handover 2019-05-30 15:16:16 +02:00
Matt Layher 32912dc778 device, tun: rearrange code and fix device tests
Signed-off-by: Matt Layher <mdlayher@gmail.com>
2019-05-29 18:34:55 +02:00
Jason A. Donenfeld fbcd995ec1 device: darwin actually doesn't need bound interfaces 2019-05-25 18:10:52 +02:00
Jason A. Donenfeld e7e286ba6c device: make initiations per second match kernel implementation 2019-05-25 02:07:18 +02:00
Jason A. Donenfeld f70546bc2e device: timers: add jitter on ack failure reinitiation 2019-05-24 13:48:25 +02:00
Jason A. Donenfeld c718f3940d device: fail to give bind if it doesn't exist 2019-05-17 15:35:20 +02:00
Jason A. Donenfeld 583ebe99f1 version: bump snapshot 2019-05-17 10:28:04 +02:00
Jason A. Donenfeld 3bf41b06ae global: regroup all imports 2019-05-14 09:09:52 +02:00
Jason A. Donenfeld 586112b5d7 conn: remove scope when sanity checking IP address format 2019-05-09 15:42:35 +02:00
Jason A. Donenfeld d3dd991e4e device: send: check packet length before freeing element 2019-04-18 23:23:03 +09:00
Jason A. Donenfeld 0b77bf78cd conn: linux: RTA_MARK has moved to x/sys 2019-04-13 02:01:20 +02:00
Jason A. Donenfeld 18fa270472 version: put version in right place 2019-04-09 10:39:48 +02:00
Jason A. Donenfeld 6440f010ee receive: implement flush semantics 2019-03-21 14:45:41 -06:00
Jason A. Donenfeld c050c6e60f uapi: remove unhelpful log messages 2019-03-20 23:40:20 -06:00
Jason A. Donenfeld 2c51d6af48 uapi: report endpoint error 2019-03-19 00:34:04 -06:00
Jason A. Donenfeld 3dd9a0535f uapi: make ipcerror conform to interface 2019-03-10 02:49:44 +01:00
Jason A. Donenfeld 26af6c4651 receive: squelch tear down error 2019-03-07 02:03:48 +01:00
Jason A. Donenfeld 68f0721c6a tun: import mobile particularities 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld b8e85267cf boundif: introduce API for socket binding 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld 69f0fe67b6 global: begin modularization 2019-03-03 05:00:40 +01:00