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396 Commits

Author SHA1 Message Date
David Crawshaw
c576a57067 wgengine: avoid holding any locks during HandshakeDone 
Because wgLock is held while some wireguard-go methods run,
trying to hold wgLock during HandshakeDone potentially creates
lock cycles between wgengine and internals of wireguard-go.

Arguably wireguard-go should call HandshakeDone in a new goroutine,
but until its API promises that, don't make any assumptions here.

Maybe for #110.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-28 06:32:38 -05:00
Brad Fitzpatrick
c185e6b4b0 stunner: support IPv6, add latency info to callbacks, use unique TxIDs per retry 
And some more docs.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-27 09:23:51 -08:00
David Crawshaw
44670d0da9 wgengine: revert wgdev.Close on Close from last commit 
Causes as-yet-unknown problems in some tests.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-25 17:00:37 -05:00
wardn
9390a3ef55 wgengine: properly clean up freebsd routes and interfaces on close 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-25 16:40:10 -05:00
David Crawshaw
7a3be96199 wgengine: add pinger to generate initial spray packets 
For 3 seconds after a successful handshake, wgengine will send a
ping packet every 300ms to its peer. This ensures the spray logic
in magicsock has something to spray.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-25 15:09:08 -05:00
David Crawshaw
a6ad3c46e2 magicsock: spray some normal packets after a handshake 
In particular, this is designed to catch the case where a
HandshakeInitiation packet is sent out but the intermediate NATs
have not been primed, so the packet passes over DERP.
In that case, the HandshakeResponse also comes back over DERP,
and the connection proceeds via DERP without ever trying to punch
through the NAT.

With this change, the HandshakeResponse (which was sprayed out
and so primed one NAT) triggers an UpdateDst, which triggers
the extra spray logic.

(For this to work, there has to be an initial supply of packets
to send on to a peer for the three seconds following a handshake.
The source of these packets is left as a future exercise.)

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-24 17:29:35 -05:00
Brad Fitzpatrick
8696b17b5f wgengine/magicsock: turn off DERP log spamminess by default 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-24 10:24:12 -08:00
Brad Fitzpatrick
7a3b91390b wgengine/magicsock: fix crash in Send when Endpoint isn't an AddrSet 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-24 08:47:20 -08:00
David Crawshaw
868cfae84f wgengine, magicsock: adjust for wireguard-go conn/device package split 
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-24 07:30:14 -05:00
wardn
c51b8c206d wgengine: resolv.conf spelling corrections 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-22 06:44:56 -08:00
Brad Fitzpatrick
cc7b9b0dff control/controlclient: fix priority of DERP server, add comment 2020-02-21 14:47:05 -08:00
Brad Fitzpatrick
c02f4b5a1f control/controlclient: add temporary mechanism to force derp on 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-21 14:09:24 -08:00
Brad Fitzpatrick
525bf1f3d2 wgengine/magicsock: remember fixed port number preference 
So LinkChange events rebind to the same port when possible.
 2020-02-21 13:51:18 -08:00
Brad Fitzpatrick
379a3125fd derp, wgengine/magicsock: support more than just packets from Client.Recv 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-20 22:08:13 -08:00
David Crawshaw
4ebc0fa70f wgengine: incremental update of peers on network map change 
This is the first, and easier, part of incremental wireguard-go
reconfiguration. It means that a new node appearing on the
network does not cause all existing nodes to re-handshake with
the other nodes they are talking to.

(This code has been running on hello.ipn.dev for a few weeks and
peers have successfully reconnected to it through many network
map updates.)

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-20 13:48:34 -05:00
Brad Fitzpatrick
d298d5b1f8 wgengine/magicsock: support multiple derp servers, and not just for handshakes 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-20 08:10:12 -08:00
Martin Baillie
a9bff99a9b wgengine: add OpenBSD router DNS update handling 
Also removes validated TODO comments.

Signed-off-by: Martin Baillie <martin@baillie.email>
 2020-02-20 08:03:07 -08:00
David Crawshaw
45d687e213 wgengine: fix build on linux/freebsd/openbsd/windows 
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-19 11:58:59 -05:00
David Crawshaw
d0f697ee07 wgengine: update for wgcfg changes 
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
 2020-02-19 11:44:37 -05:00
Brad Fitzpatrick
fd1aa4f7f6 wgengine/magicsock: add a reSTUN method 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-18 10:55:36 -08:00
Brad Fitzpatrick
e06ca40650 wgengine, magicsock, derp: misc cleanups, docs 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-18 08:58:00 -08:00
wardn
5d79530caa wgengine: create freebsd-specific implementation 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-17 19:16:08 -08:00
Brad Fitzpatrick
259406e797 derp: move away from [32]byte key types 
And some minor cleanup in the process.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-17 14:18:09 -08:00
Tobias Klauser
4d09316f9a wgengine/monitor: use RTMGRP_* consts from x/sys/unix 
Bump golang.org/x/sys/unix to get the RTMGRP_* consts and use them.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
 2020-02-17 14:15:08 -08:00
Brad Fitzpatrick
997678f540 wgengine/monitor: make Close not block forever on Linux 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-17 11:39:33 -08:00
Brad Fitzpatrick
7f5e3febe5 wgengine: move link monitor to be owned by the engine, not the router 
And make the monitor package portable with no-op implementations on
unsupported operating systems.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-17 09:53:17 -08:00
Brad Fitzpatrick
79295b1138 wgengine: simplify, change some signatures 
* make RouterGen return an error, not take both tunname and tundev
* also remove RouteGen taking a wireguard/device.Device; currently unused
* remove derp parameter (it'll work differently)
* unexport NewUserspaceRouter in per-OS impls, add documented wrapper

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-17 08:04:31 -08:00
Brad Fitzpatrick
2896be60db Move "logger" package to under types, now that we have it. 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-14 20:23:05 -08:00
Brad Fitzpatrick
587c3fcac4 control/controlclient, wgengine/magicsock: misc cleanups 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-14 09:50:08 -08:00
wardn
58ce50389e wgengine: build for freebsd 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-14 08:40:04 -08:00
wardn
2cafbd74c7 monitor: refactor for architecture-specific connection implementations 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-13 09:46:17 -08:00
Brad Fitzpatrick
c773abde77 wgengine: fix nil pointer deref crash from earlier change 
Fixes #45
 2020-02-13 08:59:31 -08:00
Brad Fitzpatrick
745c8c92b1 wgengine: fix windows build for winipcfg-go 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-12 22:05:13 -08:00
David Anderson
36f5433476 wgengine: fix the build on darwin, windows, openbsd. 
7e5e3277 changed the Router interface definition, but forgot to
fix up these platform files.

Signed-off-by: David Anderson <dave@natulte.net>
 2020-02-12 16:16:05 -08:00
David Anderson
5c2deb66be wgengine: remove MTU TODO. 
The MTU is currently set when creating the tun device,
elsewhere in the code. Maybe someday we'll want some kind
of per-platform MTU configuration here, but not in the
short-medium term.

Signed-off-by: David Anderson <dave@natulte.net>
 2020-02-12 15:59:13 -08:00
David Anderson
afa83358f7 wgenging: use logger.Logf type in openbsd router. 
Signed-off-by: David Anderson <dave@natulte.net>
 2020-02-12 15:58:49 -08:00
Martin Baillie
15f8c8dde4 wgengine: add initial rough OpenBSD implementation 
Signed-off-by: Martin Baillie <martin@baillie.email>
 2020-02-12 15:57:49 -08:00
Brad Fitzpatrick
7e5e32775a wgengine: flesh out some docs, minor cleanups 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-12 13:37:45 -08:00
Brad Fitzpatrick
819daf10e2 wgengine: flesh out some docs 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-12 13:37:45 -08:00
wardn
490e586eac wgengine: add required NewFakeRouter parameter 
Signed-off-by: wardn <wardn@users.noreply.github.com>
 2020-02-12 13:09:33 -08:00
Brad Fitzpatrick
a59dc5f155 Use logger.Logf consistently. It was used in most places. 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2020-02-11 09:38:32 -08:00
David Anderson
2f9cdd0aac wgengine: fix error string. 
Signed-off-by: David Anderson <dave@natulte.net>
 2020-02-11 00:01:58 -08:00
David Anderson
43becc4334 wgengine/packet: fix minor lint errors. 
Signed-off-by: David Anderson <dave@natulte.net>
 2020-02-11 00:01:14 -08:00
David Anderson
a07906d1d8 wgengine: make SetRoutesFunc less appealing to use. 
It exists as a way to glue the mac-specific xcode logic with the OSS
logic, and shouldn't be used by anything but the xcode glue.
 2020-02-10 21:40:00 -08:00
David Crawshaw
87334fb332 wgengine, controlclient: fewer pointers in wgcfg key types 
Signed-off-by: David Crawshaw <david@zentus.com>
 2020-02-10 22:09:59 -05:00
Earl Lee
a8d8b8719a Move Linux client & common packages into a public repo. 2020-02-09 09:32:57 -08:00