Commit Graph

1508 Commits (main)

Author SHA1 Message Date
Brad Fitzpatrick 89a2c3eb04 wgengine: don't create duplicate iptables rules on Linux, clean up
Fixes #131

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 657f9593ae Reduce some logspam. 4 years ago
Brad Fitzpatrick 4675c70464 wgengine/magicsock: check STUN regularly 4 years ago
Brad Fitzpatrick bc7bc43fb8 magicsock, interfaces: move some code from magicsock to interfaces 4 years ago
Brad Fitzpatrick af7a01d6f0 wgengine/magicsock: drop donec channel, rename epUpdateCtx to serve its purpose 4 years ago
David Crawshaw cc4afa775f magicsock: rate limit send error log messages
The x/time/rate dependency adds 24kb to tailscaled binary size.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
David Crawshaw 0752c77dc2 magicsock: keep DERP magic IPs out of the address map
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
David Crawshaw c6550135d5 magicsock: remove the index from indexedAddrs
The value predates the introduction of AddrSet which replaces
the index by tracking curAddr directly.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
David Crawshaw d417be6a4b controlclinet: clone filter.MatchAllowAll
This avoids a non-obvious data race, where the JSON decoder ends
up creating do-nothing writes into global variables.

	==================
	WARNING: DATA RACE
	Write at 0x0000011e1860 by goroutine 201:
	  tailscale.com/wgengine/packet.(*IP).UnmarshalJSON()
	      /home/crawshaw/repo/corp/oss/wgengine/packet/packet.go:83 +0x2d9
	  encoding/json.(*decodeState).literalStore()
	      /home/crawshaw/go/go/src/encoding/json/decode.go:877 +0x445e
	...
	  encoding/json.Unmarshal()
	      /home/crawshaw/go/go/src/encoding/json/decode.go:107 +0x1de
	  tailscale.com/control/controlclient.(*Direct).decodeMsg()
	      /home/crawshaw/repo/corp/oss/control/controlclient/direct.go:615 +0x1ab
	  tailscale.com/control/controlclient.(*Direct).PollNetMap()
	      /home/crawshaw/repo/corp/oss/control/controlclient/direct.go:525 +0x1053
	  tailscale.com/control/controlclient.(*Client).mapRoutine()
	      /home/crawshaw/repo/corp/oss/control/controlclient/auto.go:428 +0x3a6
	Previous read at 0x0000011e1860 by goroutine 86:
	  tailscale.com/wgengine/filter.matchIPWithoutPorts()
	      /home/crawshaw/repo/corp/oss/wgengine/filter/match.go:108 +0x91
	  tailscale.com/wgengine/filter.(*Filter).runIn()
	      /home/crawshaw/repo/corp/oss/wgengine/filter/filter.go:147 +0x3c6
	  tailscale.com/wgengine/filter.(*Filter).RunIn()
	      /home/crawshaw/repo/corp/oss/wgengine/filter/filter.go:127 +0xb0
	  tailscale.com/wgengine.(*userspaceEngine).SetFilter.func1()
	      /home/crawshaw/repo/corp/oss/wgengine/userspace.go:390 +0xfc
	  github.com/tailscale/wireguard-go/device.(*Device).RoutineDecryption()
	      /home/crawshaw/repo/corp/wireguard-go/device/receive.go:295 +0xa1f

For #112

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
Brad Fitzpatrick 1abf2da392 wgengine/magicsock: reset favorite address on handshakes
Updates #92 (not a complete fix; could be better/faster?)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 67ede8d6d2 wgengine, magicsock: fix SetPrivateKey data race
Updates #112

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 19b54d0ae7 wgengine: fix a data race on StatusCallback
Updates tailscale/tailscale#112

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
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>
4 years ago
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>
4 years ago
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>
4 years ago
wardn 9390a3ef55 wgengine: properly clean up freebsd routes and interfaces on close
Signed-off-by: wardn <wardn@users.noreply.github.com>
4 years ago
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>
4 years ago
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>
4 years ago
Brad Fitzpatrick 8696b17b5f wgengine/magicsock: turn off DERP log spamminess by default
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 7a3b91390b wgengine/magicsock: fix crash in Send when Endpoint isn't an AddrSet
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Crawshaw 868cfae84f wgengine, magicsock: adjust for wireguard-go conn/device package split
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
wardn c51b8c206d wgengine: resolv.conf spelling corrections
Signed-off-by: wardn <wardn@users.noreply.github.com>
4 years ago
Brad Fitzpatrick cc7b9b0dff control/controlclient: fix priority of DERP server, add comment 4 years ago
Brad Fitzpatrick c02f4b5a1f control/controlclient: add temporary mechanism to force derp on
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 525bf1f3d2 wgengine/magicsock: remember fixed port number preference
So LinkChange events rebind to the same port when possible.
4 years ago
Brad Fitzpatrick 379a3125fd derp, wgengine/magicsock: support more than just packets from Client.Recv
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
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>
4 years ago
Brad Fitzpatrick d298d5b1f8 wgengine/magicsock: support multiple derp servers, and not just for handshakes
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Martin Baillie a9bff99a9b wgengine: add OpenBSD router DNS update handling
Also removes validated TODO comments.

Signed-off-by: Martin Baillie <martin@baillie.email>
4 years ago
David Crawshaw 45d687e213 wgengine: fix build on linux/freebsd/openbsd/windows
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
David Crawshaw d0f697ee07 wgengine: update for wgcfg changes
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
Brad Fitzpatrick fd1aa4f7f6 wgengine/magicsock: add a reSTUN method
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick e06ca40650 wgengine, magicsock, derp: misc cleanups, docs
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
wardn 5d79530caa wgengine: create freebsd-specific implementation
Signed-off-by: wardn <wardn@users.noreply.github.com>
4 years ago
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>
4 years ago
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>
4 years ago
Brad Fitzpatrick 997678f540 wgengine/monitor: make Close not block forever on Linux
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
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>
4 years ago
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>
4 years ago
Brad Fitzpatrick 2896be60db Move "logger" package to under types, now that we have it.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 587c3fcac4 control/controlclient, wgengine/magicsock: misc cleanups
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
wardn 58ce50389e wgengine: build for freebsd
Signed-off-by: wardn <wardn@users.noreply.github.com>
4 years ago
wardn 2cafbd74c7 monitor: refactor for architecture-specific connection implementations
Signed-off-by: wardn <wardn@users.noreply.github.com>
4 years ago
Brad Fitzpatrick c773abde77 wgengine: fix nil pointer deref crash from earlier change
Fixes #45
4 years ago
Brad Fitzpatrick 745c8c92b1 wgengine: fix windows build for winipcfg-go
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
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>
4 years ago
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>
4 years ago
David Anderson afa83358f7 wgenging: use logger.Logf type in openbsd router.
Signed-off-by: David Anderson <dave@natulte.net>
4 years ago
Martin Baillie 15f8c8dde4 wgengine: add initial rough OpenBSD implementation
Signed-off-by: Martin Baillie <martin@baillie.email>
4 years ago
Brad Fitzpatrick 7e5e32775a wgengine: flesh out some docs, minor cleanups
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 819daf10e2 wgengine: flesh out some docs
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
wardn 490e586eac wgengine: add required NewFakeRouter parameter
Signed-off-by: wardn <wardn@users.noreply.github.com>
4 years ago
Brad Fitzpatrick a59dc5f155 Use logger.Logf consistently. It was used in most places.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 2f9cdd0aac wgengine: fix error string.
Signed-off-by: David Anderson <dave@natulte.net>
4 years ago
David Anderson 43becc4334 wgengine/packet: fix minor lint errors.
Signed-off-by: David Anderson <dave@natulte.net>
4 years ago
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.
4 years ago
David Crawshaw 87334fb332 wgengine, controlclient: fewer pointers in wgcfg key types
Signed-off-by: David Crawshaw <david@zentus.com>
4 years ago
Earl Lee a8d8b8719a Move Linux client & common packages into a public repo. 4 years ago