When we don't care about the payload value and are just checking whether
a set contains an IP/prefix, we can use `bart.Lite` for the same lookup
times but a lower memory footprint.
Fixes#19075
Change-Id: Ia709e8b718666cc61ea56eac1066467ae0b6e86c
Signed-off-by: Alex Chan <alexc@tailscale.com>
This file was never truly necessary and has never actually been used in
the history of Tailscale's open source releases.
A Brief History of AUTHORS files
---
The AUTHORS file was a pattern developed at Google, originally for
Chromium, then adopted by Go and a bunch of other projects. The problem
was that Chromium originally had a copyright line only recognizing
Google as the copyright holder. Because Google (and most open source
projects) do not require copyright assignemnt for contributions, each
contributor maintains their copyright. Some large corporate contributors
then tried to add their own name to the copyright line in the LICENSE
file or in file headers. This quickly becomes unwieldy, and puts a
tremendous burden on anyone building on top of Chromium, since the
license requires that they keep all copyright lines intact.
The compromise was to create an AUTHORS file that would list all of the
copyright holders. The LICENSE file and source file headers would then
include that list by reference, listing the copyright holder as "The
Chromium Authors".
This also become cumbersome to simply keep the file up to date with a
high rate of new contributors. Plus it's not always obvious who the
copyright holder is. Sometimes it is the individual making the
contribution, but many times it may be their employer. There is no way
for the proejct maintainer to know.
Eventually, Google changed their policy to no longer recommend trying to
keep the AUTHORS file up to date proactively, and instead to only add to
it when requested: https://opensource.google/docs/releasing/authors.
They are also clear that:
> Adding contributors to the AUTHORS file is entirely within the
> project's discretion and has no implications for copyright ownership.
It was primarily added to appease a small number of large contributors
that insisted that they be recognized as copyright holders (which was
entirely their right to do). But it's not truly necessary, and not even
the most accurate way of identifying contributors and/or copyright
holders.
In practice, we've never added anyone to our AUTHORS file. It only lists
Tailscale, so it's not really serving any purpose. It also causes
confusion because Tailscalars put the "Tailscale Inc & AUTHORS" header
in other open source repos which don't actually have an AUTHORS file, so
it's ambiguous what that means.
Instead, we just acknowledge that the contributors to Tailscale (whoever
they are) are copyright holders for their individual contributions. We
also have the benefit of using the DCO (developercertificate.org) which
provides some additional certification of their right to make the
contribution.
The source file changes were purely mechanical with:
git ls-files | xargs sed -i -e 's/\(Tailscale Inc &\) AUTHORS/\1 contributors/g'
Updates #cleanup
Change-Id: Ia101a4a3005adb9118051b3416f5a64a4a45987d
Signed-off-by: Will Norris <will@tailscale.com>
If natc is running on a host with tailscale using `--accept-dns=true`
then a DNS loop can occur. Provide a flag for some specific DNS
upstreams for natc to use instead, to overcome such situations.
Updates #14667
Signed-off-by: James Tucker <james@tailscale.com>
Because we derive v6 addresses from v4 addresses we only need to store
the v4 address, not both.
Updates #14667
Signed-off-by: Fran Bull <fran@tailscale.com>
Ensure that the upstream is always queried, so that if upstream is going
to NXDOMAIN natc will also return NXDOMAIN rather than returning address
allocations.
At this time both IPv4 and IPv6 are still returned if upstream has a
result, regardless of upstream support - this is ~ok as we're proxying.
Rewrite the tests to be once again slightly closer to integration tests,
but they're still very rough and in need of a refactor.
Further refactors are probably needed implementation side too, as this
removed rather than added units.
Updates #15367
Signed-off-by: James Tucker <james@tailscale.com>
Make the perPeerState objects able to function independently without a
shared reference to the connector.
We don't currently change the values from connector that perPeerState
uses at runtime. Explicitly copying them at perPeerState creation allows
us to, for example, put the perPeerState into a consensus algorithm in
the future.
Updates #14667
Signed-off-by: Fran Bull <fran@tailscale.com>
Avoid the unbounded runtime during random allocation, if random
allocation fails after a first pass at random through the provided
ranges, pick the next free address by walking through the allocated set.
The new ipx utilities provide a bitset based allocation pool, good for
small to moderate ranges of IPv4 addresses as used in natc.
Updates #15367
Signed-off-by: James Tucker <james@tailscale.com>
This is a very dumb fix as it has an unbounded worst case runtime. IP
allocation needs to be done in a more sane way in a follow-up.
Updates #15367
Signed-off-by: James Tucker <james@tailscale.com>
These tests aren't perfect, nor is this complete coverage, but this is a
set of coverage that is at least stable.
Updates #15367
Signed-off-by: James Tucker <james@tailscale.com>
Alex Chan
Will Norris
James Tucker
Fran Bull