This is important because some of those v6 sockets are actually
dual-stacked sockets, so this is our only chance of discovering
some services.
Fixes#1443.
Signed-off-by: David Anderson <danderson@tailscale.com>
And if we have over 10,000 CGNAT routes, just route the entire
CGNAT range. (for the hello test server)
Fixes#1450
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Also change the type to netaddr.IP while here, because it made sorting
easier.
Updates tailscale/corp#1397
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The Engine.LinkChange method was recently removed in
e3df29d488 while misremembering how
Android's link state mechanism worked.
Rather than do some last minute rearchitecting of link state on
Android before Tailscale 1.6, restore the old Engine.LinkChange hook
for now so the Android client doesn't need any changes. But change how
it's implemented to instead inject an event into the link monitor.
Fixes#1427
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We often see things in logs like:
2021-03-02 17:52:45.2456258 +0800 +0800: winhttp: Open: The parameter is incorrect.
2021-03-02 17:52:45.2506261 +0800 +0800: tshttpproxy: winhttp: GetProxyForURL("https://log.tailscale.io/c/tailnode.log.tailscale.io/5037bb42f4bc330e2d6143e191a7ff7e837c6be538139231de69a439536e0d68"): ERROR_INVALID_PARAMETER [unexpected]
I have a hunch that WinHTTP has thread-local state. If so, this would fix it.
If not, this is pretty harmless.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
FreeBSD tun devices don't work with the way we implement IPv6
https://github.com/tailscale/tailscale/issues/1307
At least for now, remove any IPv6 addresses from the netmap.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
This is necessary because either protocol can be disabled globally by a
Windows registry policy, at which point trying to touch that address
family results in "Element not found" errors. This change skips programming
address families that Windows tell us are unavailable.
Fixes#1396.
Signed-off-by: David Anderson <danderson@tailscale.com>
Not great, but lets people working on new ports get going more quickly
without having to do everything up front.
As the link monitor is getting used more, I felt bad having a useless
implementation.
Updates #815
Updates #1427
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
DefaultRouteInterface was previously guarded by build tags such that
it was only accessible to tailscaled-on-macos, but there was no reason
for that. It runs fine in the sandbox and gives better default info,
so merge its file into interfaces_darwin.go.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We used to allow that, but now it just crashes.
Separately I need to figure out why it got into this path at all,
which is #1416.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Tor has a location-hidden service feature that enables users to host services
from inside the Tor network. Each of these gets a unique DNS name that ends with
.onion. As it stands now, if a misbehaving application somehow manages to make
a .onion DNS request to our DNS server, we will forward that to the DNS server,
which could leak that to malicious third parties. See the recent bug Brave had
with this[1] for more context.
RFC 7686 suggests that name resolution APIs and libraries MUST respond with
NXDOMAIN unless they can actually handle Tor lookups. We can't handle .onion
lookups, so we reject them.
[1]: https://twitter.com/albinowax/status/1362737949872431108Fixestailscale/corp#1351
Signed-off-by: Christine Dodrill <xe@tailscale.com>
Part of overall effort to clean up, unify, use link monitoring more,
and make Tailscale quieter when all networks are down. This is especially
bad on macOS where we can get killed for not being polite it seems.
(But we should be polite in any case)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Don't use os.NewFile or (*os.File).Close on the AF_ROUTE socket. It
apparently does weird things to the fd and at least doesn't seem to
close it. Just use the unix package.
The test doesn't actually fail reliably before the fix, though. It
was an attempt. But this fixes the integration tests.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Prior to e3df29d488, the Engine.SetLinkChangeCallback fired
immediately, even if there was no change. The ipnlocal code apparently
depended on that, and it broke integration tests (which live in
another repo). So mimic the old behavior and call the ipnlocal
callback immediately at init.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This is a fork of wireguard-windows's firewall package, with
the firewall rules adjusted to better line up with tailscale's
needs.
The package was taken from commit 3cc76ed5f222ec82748ef3bd8c41d4b059e28cdb
in our fork of wireguard-go.
Signed-off-by: David Anderson <danderson@tailscale.com>
Gets it out of wgengine so the Engine isn't responsible for being a
callback registration hub for it.
This also removes the Engine.LinkChange method, as it's no longer
necessary. The monitor tells us about changes; it doesn't seem to
need any help. (Currently it was only used by Swift, but as of
14dc790137 we just do the same from Go)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
And add a --socks5-server flag.
And fix a race in SOCKS5 replies where the response header was written
concurrently with the copy from the backend.
Co-authored with Naman Sood.
Updates #707
Updates #504
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Previously tailscaled on macOS was running "/sbin/route monitor" as a
child process, but child processes aren't allowed in the Network
Extension / App Store sandbox. Instead, just do what "/sbin/route monitor"
itself does: unix.Socket(unix.AF_ROUTE, unix.SOCK_RAW, 0) and read that.
We also parse it now, but don't do anything with the parsed results yet.
We will over time, as we have with Linux netlink messages over time.
Currently any message is considered a signal to poll and see what changed.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Currently it assumes exactly 1 registered callback. This changes it to
support 0, 1, or more than 1.
This is a step towards plumbing wgengine/monitor into more places (and
moving some of wgengine's interface state fetching into monitor in a
later step)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
