snow/wireguard-go
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Author SHA1 Message Date
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