Install the previously uninstalled hooks for the filter and tstun
intercepts. Move the DNS manager hook installation into Init() with all
the others. Protect all implementations with a short-circuit if the node
is not configured to use Connectors 2025. The short-circuit pattern
replaces the previous pattern used in managing the DNS manager hook, of
setting it to nil in response to CapMap changes.
Fixestailscale/corp#38716
Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>
The hook calls into the client assigned addresses to return a view of
the transit IPs associated with that connector.
Fixestailscale/corp#38125
Signed-off-by: George Jones <george@tailscale.com>
The client needs to know the set of transit IPs that are assigned
to each connector, so when we register transit IPs with the connector
we also need to assign them to that connector in the addrAssignments.
We identify the connector by node public key to match the peer information
that is available when the ExtraWireguardAllowedIPs hook will be invoked.
Fixestailscale/corp#38127
Signed-off-by: George Jones <george@tailscale.com>
conn25 needs to add routes to the operating system to direct handling
of the addresses in the magic IP range to the tailscale0 TUN and
tailscaled.
The way we do this for exit nodes and VIP services is that we add routes
to the Routes field of router.Config, and then the config is passed to
the WireGuard engine Reconfig.
conn25 is implemented as an ipnext.Extension and so this commit adds a
hook to ipnext.Hooks to allow any extension to provide routes to the
config. The hook if provided is called in routerConfigLocked, similarly
to exit nodes and VIP services.
Fixestailscale/corp#38123
Signed-off-by: Fran Bull <fran@tailscale.com>
When the client of a connector assigns transit IP addresses for a
connector we need to let wireguard know that packets for the transit IPs
should be sent to the connector node. We do this by:
* keeping a map of node -> transit IPs we've assigned for it
* setting a callback hook within wireguard reconfig to ask us for these
extra allowed IPs.
* forcing wireguard to do a reconfig after we have assigned new transit
IPs.
And this commit is the last part: forcing the wireguard reconfig after a
new address assignment.
Fixestailscale/corp#38124
Signed-off-by: Fran Bull <fran@tailscale.com>
That will be able to be plugged into the hooks in
wgengine/filter/filter.go to let connector packets flow.
Fixestailscale/corp#37144Fixestailscale/corp#37145
Signed-off-by: Fran Bull <fran@tailscale.com>
Rename variables to match their types after the server -> connector
rename.
Updates tailscale/corp#37144
Updates tailscale/corp#37145
Signed-off-by: Fran Bull <fran@tailscale.com>
Introduce a datapathHandler that implements hooks that will
receive packets from the tstun.Wrapper. This commit does not wire
those up just yet.
Perform DNAT from Magic IP to Transit IP on outbound flows on clients,
and reverse SNAT in the reverse direction.
Perform DNAT from Transit IP to final destination IP on outbound flows
on connectors, and reverse SNAT in the reverse direction.
Introduce FlowTable to cache validated flows by 5-tuple for fast lookups
after the first packet.
Flow expiration is not covered, and is intended as future work before
the feature is officially released.
Fixestailscale/corp#34249Fixestailscale/corp#35995
Co-authored-by: Fran Bull <fran@tailscale.com>
Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>
When we are mapping a dns response, if it is a connector domain, change
the source IP addresses for our magic IP addresses. This will allow the
tailscaled to DNAT the traffic for the domain to the connector.
Updates tailscale/corp#34258
Signed-off-by: Fran Bull <fran@tailscale.com>
Changed the mapping to store the transit IPs to be indexed by
peer IP rather than NodeID because the data path only has access
to the peer's IP. This change means that IPv4 transit IPs need to
be indexed by the peer's IPv4 address, and IPv6 transit IPs need to
be indexed by the peer's IPv6 address. It is an error if the peer
does not have an address of the same family as the transit IP.
It is also an error if the transit and destination IP families do
not match.
Added a check to ensure that the TransitIPRequest.App matches a
configured app on the connector.
Added additional TransitIPResponse codes to identify the new errors
and change the exsting use of the Other code to use it's own
specific code.
Added logging for the error cases, since they generally indicate that
a peer has constructed a bad request or that there is a config
mismatch between the peer and the local netmap.
Added a test framework for handleConnectorTransitIPRequest and moved
the existing tests into the framework and added new tests.
Fixestailscale/corp#37143
Signed-off-by: George Jones <george@tailscale.com>
After we intercept a DNS response and assign magic and transit addresses
we must communicate the assignment to our connector so that it can
direct traffic when it arrives.
Use the recently added peerapi endpoint to send the addresses.
Updates tailscale/corp#34258
Signed-off-by: Fran Bull <fran@tailscale.com>
I omitted a lot of the min/max modernizers because they didn't
result in more clear code.
Some of it's older "for x := range 123".
Also: errors.AsType, any, fmt.Appendf, etc.
Updates #18682
Change-Id: I83a451577f33877f962766a5b65ce86f7696471c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We should only add one entry to our magic ips for each domain+dst and
look up any existing entry instead of always creating a new one.
Fixestailscale/corp#34252
Signed-off-by: Fran Bull <fran@tailscale.com>
The new version of app connector (conn25) needs to read DNS responses
for domains it is interested in and store and swap out IP addresses.
Add a hook to dns manager to enable this.
Give the conn25 updated netmaps so that it knows when to assign
connecting addresses and from what pool.
Assign an address when we see a DNS response for a domain we are
interested in, but don't do anything with the address yet.
Updates tailscale/corp#34252
Signed-off-by: Fran Bull <fran@tailscale.com>
Package feature/conn25 is excludeable from a build via the featuretag.
Test it is excluded for minimal builds.
Updates #12614
Signed-off-by: Fran Bull <fran@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>
When peers request an IP address mapping to be stored, the connector
stores it in memory.
Fixestailscale/corp#34251
Signed-off-by: Fran Bull <fran@tailscale.com>
Fran Bull
Michael Ben-Ami
George Jones
Andrew Lytvynov
Brad Fitzpatrick
Will Norris