snow/wireguard-go
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Author SHA1 Message Date
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 fa7763c268 wintun: delete all interfaces is not used anymore 2019-08-29 12:22:15 -06:00
Jason A. Donenfeld d94bae8348 wintun: Wintun->Interface 2019-08-29 12:20:40 -06:00
Jason A. Donenfeld 7689d09336 wintun: keep reference to pool in wintun object 2019-08-29 12:13:16 -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 e862131d3c wintun: simplify rename logic 2019-08-28 19:31:20 -06:00
Jason A. Donenfeld da28a3e9f3 wintun: give better errors when ndis interface listing fails 2019-08-28 08:39:26 -06:00
Jason A. Donenfeld 3bf3322b2c wintun: also check for numbered suffix and friendly name 2019-08-28 08:08:07 -06:00
Simon Rozman 7305b4ce93 wintun: upgrade deleting all interfaces and make it reusable 
DeleteAllInterfaces() didn't check if SPDRP_DEVICEDESC == "WireGuard
Tunnel". It deleted _all_ Wintun adapters, not just WireGuard's.

Furthermore, the DeleteAllInterfaces() was upgraded into a new function
called DeleteMatchingInterfaces() for selectively deletion. This will
be used by WireGuard to clean stale Wintun adapters.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-08-28 11:39:01 +02:00
Jason A. Donenfeld 26fb615b11 wintun: cleanup earlier 2019-08-27 11:59:15 -06:00
Jason A. Donenfeld 7fbb24afaa wintun: rename duplicate adapters instead of ourselves 2019-08-27 11:59:15 -06:00
Jason A. Donenfeld d9008ac35c wintun: match suffix numbers 2019-08-26 14:46:43 -06:00
Jason A. Donenfeld 0c540ad60e wintun: make description consistent across fields 2019-08-24 12:29:17 +02:00
Jason A. Donenfeld 3cedc22d7b wintun: try multiple names until one isn't a duplicate 2019-08-22 08:52:59 +02:00
Jason A. Donenfeld 68fea631d8 wintun: use nci.dll directly instead of buggy netshell 2019-08-21 09:16:12 +02:00
Jason A. Donenfeld ef23100a4f wintun: set friendly a bit better 
This is still wrong, but NETSETUPPKEY_Driver_FriendlyName seems a bit
tricky to use.
 2019-08-20 16:06:55 +02:00
Jason A. Donenfeld eb786cd7c1 wintun: also set friendly name after setting interface name 2019-08-19 10:12:50 +02:00
Jason A. Donenfeld 333de75370 wintun: defer requires unique variable 2019-08-19 10:12:50 +02:00
Jason A. Donenfeld d20459dc69 wintun: set adapter description name 2019-08-19 10:12:50 +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
Simon Rozman 1ff37e2b07 wintun: merge opening device registry key 
This also introduces waiting for key to appear on initial access.

See if this resolves the issue caused by HDD power-up delay resulting in
failure to create the adapter.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-08-02 16:08:49 +02:00
Simon Rozman f5e54932e6 wintun: simplify checking reboot requirement 
We never checked checkReboot() reported error anyway.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-08-02 16:08:49 +02:00
Simon Rozman 73698066d1 wintun: refactor err == nil error checking 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-08-02 15:18:58 +02:00
Jason A. Donenfeld 05ece4d167 wintun: handle error for deadgwdetect 2019-08-02 14:37:09 +02:00
Jason A. Donenfeld 6d78f89557 tun: darwin: do not attempt to close tun.event twice 
Previously it was possible for this to race. It turns out we really
don't need to set anything to -1 anyway.
 2019-08-02 12:24:17 +02:00
Jason A. Donenfeld a2249449d6 wintun: get interface path properly with cfgmgr 2019-07-23 14:58:46 +02:00
Jason A. Donenfeld eeeac287ef tun: windows: style 2019-07-23 11:45:48 +02:00
Jason A. Donenfeld b5a7cbf069 wintun: simplify resolution of dev node 2019-07-23 11:45:13 +02:00
Jason A. Donenfeld 50cd522cb0 wintun: enable sharing of pnp node 2019-07-22 17:01:27 +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 298d759f3e wintun: calculate path of NDIS device object symbolic link 2019-07-18 10:25:20 +02:00
Michael Zeltner 4d5819183e tun: openbsd: don't change MTU when it's already the expected size 
Allows for running wireguard-go as non-root user.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 2019-07-18 10:25:20 +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
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 41fdbf0971 wintun: increase registry timeout 2019-06-11 00:33:07 +02:00
Jason A. Donenfeld 03eee4a778 wintun: add helper for cleaning up 2019-06-10 11:34:59 +02:00
Jason A. Donenfeld 700860f8e6 wintun: simplify error matching and remove dumb comments 2019-06-10 11:10:49 +02:00
Jason A. Donenfeld a304f69e0d wintun: fix comments and remove hwnd param 
This now looks more idiomatic.
 2019-06-10 11:03:36 +02:00
Simon Rozman baafe92888 setupapi: add SetDeviceRegistryPropertyString description 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-10 10:43:04 +02:00
Simon Rozman a1a97d1e41 setupapi: unify ERROR_INSUFFICIENT_BUFFER handling 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-10 10:43:03 +02:00
Jason A. Donenfeld e924280baa wintun: allow controlling GUID 2019-06-10 10:43:02 +02:00
Jason A. Donenfeld bb3f1932fa setupapi: add DeviceInstanceID() 2019-06-10 10:43:01 +02:00
Jason A. Donenfeld eaf17becfa global: fixup TODO comment spacing 2019-06-06 23:00:15 +02:00
Jason A. Donenfeld 6d8b68c8f3 wintun: guid functions are upstream 2019-06-06 22:39:20 +02:00
Simon Rozman c2ed133df8 wintun: simplify DeleteInterface method signature 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-06 08:58:26 +02:00
Jason A. Donenfeld 108c37a056 wintun: don't run HrRenameConnection in separate thread 
It's very slow, but unfortunately we haven't a choice. NLA needs this to
have completed.
 2019-06-05 13:09:20 +02:00
Simon Rozman e4b0ef29a1 tun: windows: obsolete 256 packets per exchange buffer limitation 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-05 11:55:28 +02:00
Simon Rozman 625e445b22 setupapi, wintun: replace syscall with golang.org/x/sys/windows 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-04 14:54:56 +02:00
Simon Rozman 85b85e62e5 wintun: set DI_QUIETINSTALL flag for GUI-less device management 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-04 14:45:23 +02:00
Simon Rozman 014f736480 setupapi: define PropChangeParams struct 
This structure is required for calling DIF_PROPERTYCHANGE installer
class.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-06-04 14:45:23 +02:00
Jason A. Donenfeld da61947ec3 tun: windows: mitigate infinite loop in Flush() 
It's possible that for whatever reason, we keep returning EOF, resulting
in repeated close/open/write operations, except with empty packets.
 2019-05-31 16:55:03 +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 d4034e5f8a wintun: remove extra / 2019-05-26 02:20:01 +02:00
Simon Rozman 6a0a3a5406 wintun: revise GetInterface() 
- Make foreign interface found error numeric to ease condition
  detection.
- Update GetInterface() documentation.
- Make tun.CreateTUN() quit when foreign interface found before
  attempting to create a Wintun interface with a duplicate name.
  Creation is futile.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-24 09:29:57 +02:00
Jason A. Donenfeld 8fdcf5ee30 wintun: never return nil, nil 2019-05-23 15:25:53 +02:00
Simon Rozman dc9bbec9db setupapi: trim "Get" from getters 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-22 19:31:52 +02:00
Jason A. Donenfeld a6dbe4f475 wintun: don't try to flush interface, but rather delete 2019-05-17 16:06:02 +02:00
Jason A. Donenfeld 95c70b8032 wintun: make certain methods private 2019-05-17 15:01:08 +02:00
Simon Rozman 7d5f5bcc0d wintun: change acronyms to uppercase 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-17 10:22:34 +02:00
Jason A. Donenfeld 3bf41b06ae global: regroup all imports 2019-05-14 09:09:52 +02:00
Jason A. Donenfeld 3147f00089 wintun: registry: fix nits 2019-05-11 17:25:48 +02:00
Simon Rozman 6c1b66802f wintun: registry: revise value reading 
- Make getStringValueRetry() reusable for reading any value type. This
  merges code from GetIntegerValueWait().
- expandString() >> toString() and extend to support REG_MULTI_SZ
  (to return first value of REG_MULTI_SZ). Furthermore, doing our own
  UTF-16 to UTF-8 conversion works around a bug in windows/registry's
  GetStringValue() non-zero terminated string handling.
- Provide toInteger() analogous to toString()
- GetStringValueWait() tolerates and reads REG_MULTI_SZ too now. It
  returns REG_MULTI_SZ[0], making GetFirstStringValueWait() redundant.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-11 17:14:37 +02:00
Jason A. Donenfeld 5669ed326f wintun: call HrRenameConnection in another thread 2019-05-10 21:31:37 +02:00
Jason A. Donenfeld 2d847a38a2 wintun: add LUID accessor 2019-05-10 21:30:23 +02:00
Jason A. Donenfeld 7a8553aef0 wintun: enumerate faster by using COMPATDRIVER instead of CLASSDRIVER 2019-05-10 20:30:59 +02:00
Jason A. Donenfeld a6045ac042 wintun: destroy devinfolist after usage 2019-05-10 20:19:11 +02:00
Simon Rozman 1c92b48415 wintun: registry: replace REG_NOTIFY with NOTIFY 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-10 18:09:20 +02:00
Jason A. Donenfeld c267965bf8 wintun: IpConfig is a MULTI_SZ, and fix errors 2019-05-10 18:06:49 +02:00
Jason A. Donenfeld 1bf1dadf15 wintun: poll for device key 
It's actually pretty hard to guess where it is.
 2019-05-10 17:34:03 +02:00
Jason A. Donenfeld f9dcfccbb7 wintun: fix scope of error object 2019-05-10 16:59:24 +02:00
Simon Rozman 7e962a9932 wintun: wait for interface registry key on device creation 
By using RegNotifyChangeKeyValue(). Also disable dead gateway detection.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-10 16:43:58 +02:00
Simon Rozman dcb8f1aa6b wintun: fix GUID leading zero padding 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-05-09 12:16:21 +02:00
Jason A. Donenfeld 81ca08f1b3 setupapi: safer aliasing of slice types 2019-05-03 09:34:00 +02:00
Jason A. Donenfeld 2e988467c2 wintun: work around GetInterface staleness bug 2019-05-03 00:42:36 +02:00
Jason A. Donenfeld 46dbf54040 wintun: don't retry when not creating 
The only time we're trying to counteract the race condition is when
we're creating a driver. When we're simply looking up all drivers, it
doesn't make sense to retry.
 2019-05-02 23:53:15 +02:00
Jason A. Donenfeld 247e14693a wintun: try harder to open registry key 
This sucks. Can we please find a deterministic way of doing this
instead?
 2019-04-29 14:00:49 +02:00
Jason A. Donenfeld bb42ec7d18 tun: freebsd: work around numerous kernel panics on shutdown 
There are numerous race conditions. But even this will crash it:

while true; do ifconfig tun0 create; ifconfig tun0 destroy; done

It seems like LLv6 is related, which we're not using anyway, so
explicitly disable it on the interface.
 2019-04-23 18:00:23 +09:00
Simon Rozman f1dc167901 setupapi: Fix struct size mismatches 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-04-19 10:08:11 +02:00
Jason A. Donenfeld c7a26dfef3 setupapi: actually fix padding by rounding up to sizeof(void*) 2019-04-19 10:19:00 +09:00
Jason A. Donenfeld d024393335 tun: darwin: write routeSocket variable in helper 
Otherwise the race detector "complains".
 2019-04-19 07:53:19 +09:00
Simon Rozman 5811447b38 setupapi: Revise DrvInfoDetailData struct size calculation 
Go adds trailing padding to DrvInfoDetailData struct in GOARCH=386 which
confuses SetupAPI expecting exactly sizeof(SP_DRVINFO_DETAIL_DATA).

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-04-18 10:39:22 +02:00
Jason A. Donenfeld e0a8c22aa6 windows: use proper constants from updated x/sys 2019-04-13 02:02:02 +02:00
Simon Rozman ef5f3ad80a tun: windows: Adopt new error codes returned by Wintun 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-04-11 19:38:11 +02:00
Simon Rozman a291fdd746 tun: windows: do not sleep after OPERATION_ABORTED on write 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-04-11 19:37:04 +02:00
Jason A. Donenfeld e680008700 tun: windows: do not sleep after OPERATION_ABORTED 2019-04-09 07:36:03 +02:00
Simon Rozman 767c86f8cb tun: windows: Retry R/W on ERROR_OPERATION_ABORTED 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-04-04 09:20:18 +02:00
Simon Rozman 421c1f9143 tun: windows: Attempt to reopen handle on all errors 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-04-03 05:41:38 +02:00
Jason A. Donenfeld ac25702eaf wintun: rename device using undocumented API that netsh.exe uses 2019-04-01 12:04:44 +02:00
Jason A. Donenfeld 92f8474832 wintun: add more retry loops 2019-04-01 09:07:43 +02:00
Jason A. Donenfeld 2e0ed4614a tun: windows: cancel ongoing reads on closing and delete after close 
This reverts commit 52ec440d79 and adds
some spice.
 2019-03-26 16:14:32 +01:00
Jason A. Donenfeld 2fa80c0cb7 wintun: query for NetCfgInstanceId several times 2019-03-22 16:48:40 -06:00
Jason A. Donenfeld 52ec440d79 tun: windows: delete interface before deleting file handles 2019-03-22 16:45:58 -06:00
Simon Rozman 2faf2dcf90 tun: windows: Make adapter rename asynchronous 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-22 16:36:30 +01:00
Simon Rozman 41c30a7279 tun: windows: Adapter devices renamed to WINTUN<LUID Index> 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-22 15:29:14 +01:00
Simon Rozman 4b1db1d39b tun: windows: Increase unavailable adapter timeout to 30sec 
5 seconds was too short when debugging.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-22 13:52:51 +01:00
Simon Rozman a80db5e65e tun: windows: Make writing persistent too 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-22 13:52:51 +01:00
Simon Rozman 9748a52073 tun: windows: Fix paused adapter test 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-22 13:52:51 +01:00
Jason A. Donenfeld 317d716d66 tun: windows: just open two file handles 2019-03-21 15:20:09 -06:00
Jason A. Donenfeld 6440f010ee receive: implement flush semantics 2019-03-21 14:45:41 -06:00
Jason A. Donenfeld 49ea0c9b1a tun: windows: add dummy overlapped events back 
These seem basically wrong to me, but we get crashes without them.
 2019-03-21 02:29:09 -06:00
Jason A. Donenfeld ca59b60aa7 tun: windows: use new constants in sys 2019-03-20 23:42:30 -06:00
Simon Rozman 91b4e909bb wintun: Use native Win32 API for I/O 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-21 00:56:45 +01:00
Jason A. Donenfeld 03f2e2614a tun: windows: wintun does iocp 2019-03-18 02:42:45 -06:00
Jason A. Donenfeld b0e0ab308d tun: windows: temporary hack for forcing MTU 2019-03-13 02:52:32 -06:00
Jason A. Donenfeld 66fb5caf02 wintun: Poll more often 2019-03-10 03:47:54 +01:00
Simon Rozman c2a2b8d739 wintun: Make errors more descriptive 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-08 10:03:57 +01:00
Simon Rozman 70449f1a97 wintun: Return correct reboot-req flag on CreateInterface() error too 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-08 10:03:57 +01:00
Simon Rozman 33c3528430 wintun: Fix double-quoted strings escaping on output 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-08 10:03:57 +01:00
Simon Rozman 30ab07e354 wintun: Introduce SetupAPI enumerator and machineName consts 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-08 10:03:57 +01:00
Simon Rozman 368dea72fe wintun: Cleanup 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-07 21:12:20 +01:00
Simon Rozman 9b22255cad wintun: Refactor network registry key name generation 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-07 21:12:20 +01:00
Simon Rozman 11f5780250 wintun: Revise interface creation wait 
DIF_INSTALLDEVICE returns almost immediately, while the device
installation continues in the background. It might take a while, before
all registry keys and values are populated.

Previously, wireguard-go waited for HKLM\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\<id> registry key
only.

Followed by a SetInterfaceName() method of Wintun struct which tried to
access HKLM\SYSTEM\CurrentControlSet\Control\Network\
{4D36E972-E325-11CE-BFC1-08002BE10318}\<id>\Connection registry key
might not be available yet.

This commit loops until both registry keys are available before
returning from CreateInterface() function.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-07 21:12:20 +01:00
Jason A. Donenfeld 92f72f5aa6 tun: linux: work out netpoll trick 2019-03-07 01:51:41 +01:00
Simon Rozman 1fdf7b19a3 wintun: Resolve some of golint warnings 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Simon Rozman a1aabb21ae Elaborate the failing step when forwarding errors on return 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Simon Rozman 9041d38e2d Simplify reading NetCfgInstanceId from registry 
As querying non-existing registry value and reading non-existing
registry string value both return ERROR_FILE_NOT_FOUND, we can
use later only.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Simon Rozman cddfd9a0d8 Unify interface-specific network registry key open 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld 68f0721c6a tun: import mobile particularities 2019-03-04 16:37:11 +01:00
Jason A. Donenfeld 69f0fe67b6 global: begin modularization 2019-03-03 05:00:40 +01:00
Jason A. Donenfeld d435be35ca tun: windows: expose GUID 2019-03-01 00:11:12 +01:00
Jason A. Donenfeld 967d1a0f3d tun: allow special methods in NativeTun 2019-03-01 00:05:57 +01:00
Jason A. Donenfeld 88ff67fb6f tun: linux: netpoll is broken for tun's epoll 
So this mostly reverts the switch to Sysconn for Linux.

Issue: https://github.com/golang/go/issues/30426
 2019-02-27 04:38:26 +01:00
Jason A. Donenfeld 971be13e77 tun: linux: netlink sock needs cleaning up but file will be gc'd 2019-02-27 04:11:41 +01:00
Jason A. Donenfeld 366cbd11a4 tun: use netpoll instead of rwcancel 
The new sysconn function of Go 1.12 makes this possible:

package main

import "log"
import "os"
import "unsafe"
import "time"
import "syscall"
import "sync"
import "golang.org/x/sys/unix"

func main() {
	fd, err := os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
	if err != nil {
		log.Fatal(err)
	}

	var ifr [unix.IFNAMSIZ + 64]byte
	copy(ifr[:], []byte("cheese"))
	*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = unix.IFF_TUN

	var errno syscall.Errno
	s, _ := fd.SyscallConn()
	s.Control(func(fd uintptr) {
		_, _, errno = unix.Syscall(
			unix.SYS_IOCTL,
			fd,
			uintptr(unix.TUNSETIFF),
			uintptr(unsafe.Pointer(&ifr[0])),
		)
	})
	if errno != 0 {
		log.Fatal(errno)
	}

	b := [4]byte{}
	wait := sync.WaitGroup{}
	wait.Add(1)
	go func() {
		_, err := fd.Read(b[:])
		log.Print("Read errored: ", err)
		wait.Done()
	}()
	time.Sleep(time.Second)
	log.Print("Closing")
	err = fd.Close()
	if err != nil {
		log.Print("Close errored: " , err)
	}
	wait.Wait()
	log.Print("Exiting")
}
 2019-02-27 01:52:55 +01:00
Jason A. Donenfeld ab0f442daf tun: use sysconn instead of .Fd with Go 1.12 2019-02-27 01:34:11 +01:00
Simon Rozman d002eff155 wintun: Read/write packet size from/to exchange buffer directly 
Driver <-> user-space communication is local and using native endian.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-22 16:16:14 +01:00
Simon Rozman e06a8f8f9f wintun: Make two-step slicing a one step 
Stop relying to Go compiler optimizations and calculate the end offset
directly.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-22 16:11:33 +01:00
Simon Rozman ac4944a708 wintun: Write exchange buffer increased back to 1MiB 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 20:13:33 +01:00
Simon Rozman 2491f9d454 wintun: Migrate from unsafe buffer handling to encoding/binary 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 20:10:24 +01:00
Simon Rozman 8091c6474a wintun: Adopt new packet data alignment 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 19:56:10 +01:00
Simon Rozman 040da43889 wintun: Cleanup 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 18:38:18 +01:00
Simon Rozman b7025b5627 wintun: Add TUN device locking 
In case reading from TUN device detected TUN device was closed, it
closed the file handle and set tunFile to nil. The tunFile is
automatically reopened on retry, but... If another packet comes in the
WireGuard calls Write() method. With tunFile set to nil, this will
cause access violation.

Therefore, locking was introduced.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 13:12:08 +01:00
Simon Rozman 6581cfb885 wintun: Move exchange buffer in separate struct on heap 
This allows buffer alignment and keeps it together with its meta-data.

Furthermore, the write buffer has been reduced - as long as we flush
after _every_ write, we don't need a 1MiB write buffer.

Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-20 11:41:37 +01:00
Simon Rozman 4863089120 wintun: Switch to dynamic packet sizes 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-19 18:50:42 +01:00
Jason A. Donenfeld 42c6d0e261 Change package path 2019-02-18 05:11:39 +01:00
Simon Rozman b719a09a26 wintun: Auto-calculate TUN exchange buffer size 
Signed-off-by: Simon Rozman <simon@rozman.si>
 2019-02-08 15:21:24 +01:00