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991 Commits 13 Branches 24 Tags 1.6 MiB
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114 Commits

Author SHA1 Message Date
James Tucker
ec8f6f82c2 tun: fix crash when ForceMTU is called after close 
Close closes the events channel, resulting in a panic from send on
closed channel.

Reported-By: Brad Fitzpatrick <brad@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2023-10-10 15:37:17 +02:00
Jason A. Donenfeld
0ad14a89f5 global: buff -> buf 
This always struck me as kind of weird and non-standard.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2023-03-13 17:55:53 +01:00
Jordan Whited
3bb8fec7e4 conn, device, tun: implement vectorized I/O plumbing 
Accept packet vectors for reading and writing in the tun.Device and
conn.Bind interfaces, so that the internal plumbing between these
interfaces now passes a vector of packets. Vectors move untouched
between these interfaces, i.e. if 128 packets are received from
conn.Bind.Read(), 128 packets are passed to tun.Device.Write(). There is
no internal buffering.

Currently, existing implementations are only adjusted to have vectors
of length one. Subsequent patches will improve that.

Also, as a related fixup, use the unix and windows packages rather than
the syscall package when possible.

Co-authored-by: James Tucker <james@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2023-03-10 14:52:13 +01:00
Jordan Whited
1e2c3e5a3c tun: guard Device.Events() against chan writes 
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2023-02-09 12:35:58 -03:00
Jason A. Donenfeld
ebbd4a4330 global: bump copyright year 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2023-02-07 20:39:29 -03:00
Jason A. Donenfeld
bb719d3a6e global: bump copyright year 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2022-09-20 17:21:32 +02:00
Brad Fitzpatrick
b51010ba13 all: use Go 1.19 and its atomic types 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2022-09-04 12:57:30 +02:00
Jason A. Donenfeld
9c9e7e2724 global: apply gofumpt 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-12-09 23:15:55 +01:00
Jason A. Donenfeld
851efb1bb6 tun: move wintun to its own repo 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-11-04 12:53:55 +01:00
Jason A. Donenfeld
82d2aa87aa wintun: use new swdevice-based API for upcoming Wintun 0.14 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-10-12 00:26:46 -06:00
Jason A. Donenfeld
69b39db0b4 tun: windows: set event before waiting 
In 097af6e ("tun: windows: protect reads from closing") we made sure no
functions are running when End() is called, to avoid a UaF. But we still
need to kick that event somehow, so that Read() is allowed to exit, in
order to release the lock. So this commit calls SetEvent, while moving
the closing boolean to be atomic so it can be modified without locks,
and then moves to a WaitGroup for the RCU-like pattern.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-05-07 09:26:24 +02:00
Jason A. Donenfeld
db733ccd65 tun: windows: rearrange struct to avoid alignment trap on 32bit 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-05-07 09:19:00 +02:00
Jason A. Donenfeld
69a42a4eef tun: windows: send MTU update when forced MTU changes 
Otherwise the padding doesn't get updated.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-05-05 11:42:45 +02:00
Jason A. Donenfeld
097af6e135 tun: windows: protect reads from closing 
The code previously used the old errors channel for checking, rather
than the simpler boolean, which caused issues on shutdown, since the
errors channel was meaningless. However, looking at this exposed a more
basic problem: Close() and all the other functions that check the closed
boolean can race. So protect with a basic RW lock, to ensure that
Close() waits for all pending operations to complete.

Reported-by: Joshua Sjoding <joshua.sjoding@scjalliance.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-04-26 22:22:45 -04:00
Brad Fitzpatrick
0f4809f366 tun: make NativeTun.Close well behaved, not crash on double close 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-02-22 15:26:29 +01:00
Jason A. Donenfeld
d4112d9096 global: bump copyright 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-01-28 17:52:15 +01:00
Jason A. Donenfeld
d664444928 tun: make customization of WintunPool and requested GUID more obvious 
Persnickety consumers can now do:

    func init() {
        tun.WintunPool, _ = wintun.MakePool("Flurp")
        tun.WintunStaticRequestedGUID, _ = windows.GUIDFromString("{5ae2716f-0b3e-4dc4-a8b5-48eba11a6e16}")
    }

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2021-01-07 14:49:44 +01:00
Simon Rozman
c9fabbd5bf wintun: log when reboot is suggested by Windows 
Which really shouldn't happen. But it is a useful information for
troubleshooting.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2020-11-25 13:58:11 +01:00
Simon Rozman
4cc7a7a455 wintun: keep original error when Wintun session start fails 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2020-11-25 13:57:05 +01:00
Jason A. Donenfeld
82128c47d9 global: switch to using %w instead of %v for Errorf 
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-11-07 21:56:32 +01:00
Simon Rozman
a3b231b31e wintun: ring management moved to wintun.dll 
Signed-off-by: Simon Rozman <simon@rozman.si>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2020-11-07 15:20:49 +01:00
Simon Rozman
3e08b8aee0 wintun: migrate to wintun.dll API 
Rather than having every application using Wintun driver reinvent the
wheel, the Wintun device/adapter/interface management has been moved
from wireguard-go to wintun.dll deployed with Wintun itself.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2020-11-07 12:46:35 +01:00
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
4fa2ea6a2d tun: windows: serialize write calls 2020-01-07 11:40:45 -05:00
Jason A. Donenfeld
2b242f9393 wintun: manage ring memory manually 
It's large and Go's garbage collector doesn't deal with it especially
well.
 2019-11-22 13:13:55 +01:00
Avery Pennarun
1b6c8ddbe8 tun: match windows CreateTUN signature to the Linux variant 
Signed-off-by: Avery Pennarun <apenwarr@gmail.com>
[zx2c4: fix default value]
 2019-10-17 15:19:20 +02:00
Jason A. Donenfeld
1f146a5e7a wintun: expose version 2019-10-08 09:58:58 +02:00
Jason A. Donenfeld
bb0b2514c0 tun: windows: unify error message format 2019-09-08 13:52:44 -05:00
Jason A. Donenfeld
14df9c3e75 wintun: take mutex so that deletion uses the right name 2019-08-30 15:34:17 +02:00
Jason A. Donenfeld
353f0956bc wintun: move ring constants into module 2019-08-29 13:22:17 -06:00
Jason A. Donenfeld
d94bae8348 wintun: Wintun->Interface 2019-08-29 12:20:40 -06:00
Simon Rozman
69c26dc258 wintun: introduce adapter pools 
This makes wintun package reusable for non-WireGuard applications.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-08-29 18:00:44 +02:00
Jason A. Donenfeld
0c540ad60e wintun: make description consistent across fields 2019-08-24 12:29:17 +02:00
Jason A. Donenfeld
01786286c1 tun: windows: don't spin unless we really need it 2019-08-19 10:12:50 +02:00
Jason A. Donenfeld
b4010123f7 tun: windows: spin for only a millisecond/80 
Performance stays the same as before.
 2019-08-03 19:11:21 +02:00
Jason A. Donenfeld
eeeac287ef tun: windows: style 2019-07-23 11:45:48 +02:00
Jason A. Donenfeld
5ba866a5c8 tun: windows: close event handle on shutdown 2019-07-22 09:37:20 +02:00
Jason A. Donenfeld
3341e2d444 tun: windows: get rid of retry logic 
Things work fine on Windows 8.
 2019-07-19 14:01:34 +02:00
Jason A. Donenfeld
1b550f6583 tun: windows: use specific IOCTL code 2019-07-19 08:30:19 +02:00
Jason A. Donenfeld
31ff9c02fe tun: windows: open file at startup time 2019-07-18 19:27:27 +02:00
Jason A. Donenfeld
1e39c33ab1 tun: windows: silently drop packet when ring is full 2019-07-18 15:48:34 +02:00
Jason A. Donenfeld
6c50fedd8e tun: windows: switch to NDIS device object 2019-07-18 12:26:57 +02:00
Jason A. Donenfeld
9ea9a92117 tun: windows: spin for a bit before falling back to event object 2019-07-18 10:25:20 +02:00
Simon Rozman
2e24e7dcae tun: windows: implement ring buffers 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-07-17 14:32:13 +02:00
Jason A. Donenfeld
5c3d333f10 tun: windows: registration of write buffer no longer required 2019-07-05 14:17:48 +02:00
Jason A. Donenfeld
d8448f8a02 tun: windows: decrease alignment to 4 2019-07-05 07:53:19 +02:00
Jason A. Donenfeld
13abbdf14b tun: windows: delay initial write 
Otherwise we provoke Wintun 0.3.
 2019-07-04 22:41:42 +02:00
Jason A. Donenfeld
b844f1b3cc tun: windows: packetNum is unused 2019-07-01 15:23:44 +02:00
Jason A. Donenfeld
5e6eff81b6 tun: windows: inform wintun of maximum buffer length for writes 2019-06-26 13:27:48 +02:00
Jason A. Donenfeld
c69d026649 tun: windows: never retry open on Windows 10 2019-06-18 17:51:29 +02:00