If the host only has RSA, use its RSA + generate ecdsa + ed25519, etc.
Perhaps fixes https://twitter.com/colek42c/status/1550554439299244032 and
something else that was reported.
Change-Id: I88dc475c8e3d95b6f25288ff7664b8e72655fd16
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Clients may have platform-specific metrics they would like uploaded
(e.g. extracted from MetricKit on iOS). Add a new local API endpoint
that allows metrics to be updated by a simple name/value JSON-encoded
struct.
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
Together with 06aa141632 this minimizes
the number of NEPacketTunnelNetworkSettings updates that we have to do,
and thus avoids Chrome interrupting outstanding requests due to
(perceived) network changes.
Updates #3102
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
And remove the GCP special-casing from ipn/ipnlocal; do it only in the
forwarder for *.internal.
Fixes#4980Fixes#4981
Change-Id: I5c481e96d91f3d51d274a80fbd37c38f16dfa5cb
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This does three things:
* If you're on GCP, it adds a *.internal DNS split route to the
metadata server, so we never break GCP DNS names. This lets people
have some Tailscale nodes on GCP and some not (e.g. laptops at home)
without having to add a Tailnet-wide *.internal DNS route.
If you already have such a route, though, it won't overwrite it.
* If the 100.100.100.100 DNS forwarder has nowhere to forward to,
it forwards it to the GCP metadata IP, which forwards to 8.8.8.8.
This means there are never errNoUpstreams ("upstream nameservers not set")
errors on GCP due to e.g. mangled /etc/resolv.conf (GCP default VMs
don't have systemd-resolved, so it's likely a DNS supremacy fight)
* makes the DNS fallback mechanism use the GCP metadata IP as a
fallback before our hosted HTTP-based fallbacks
I created a default GCP VM from their web wizard. It has no
systemd-resolved.
I then made its /etc/resolv.conf be empty and deleted its GCP
hostnames in /etc/hosts.
I then logged in to a tailnet with no global DNS settings.
With this, tailscaled writes /etc/resolv.conf (direct mode, as no
systemd-resolved) and sets it to 100.100.100.100, which then has
regular DNS via the metadata IP and *.internal DNS via the metadata IP
as well. If the tailnet configures explicit DNS servers, those are used
instead, except for *.internal.
This also adds a new util/cloudenv package based on version/distro
where the cloud type is only detected once. We'll likely expand it in
the future for other clouds, doing variants of this change for other
popular cloud environments.
Fixes#4911
RELNOTES=Google Cloud DNS improvements
Change-Id: I19f3c2075983669b2b2c0f29a548da8de373c7cf
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Client.SetExpirySooner isn't part of the state machine. Remove it from
the Client interface.
And fix a use of LocalBackend.cc without acquiring the lock that
guards that field.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
On DSM7 as a non-root user it'll run into problems.
And we haven't tested on DSM6, even though it might work, but I doubt
it.
Updates #3802
Updates tailscale/corp#5468
Change-Id: I75729042e4788f03f9eb82057482a44b319f04f3
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We weren't wiring up netstack.Impl to the LocalBackend in some cases
on Windows. This fixes Windows 7 when run as a service.
Updates #4750 (fixes after pull in to corp repo)
Change-Id: I9ce51b797710f2bedfa90545776b7628c7528e99
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Also lazify SSHServer initialization to allow restarting the server on a
subsequent `tailscale up`
Updates #3802
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Ideally we would re-establish these sessions when tailscaled comes back
up, however we do not do that yet so this is better than leaking the
sessions.
Updates #3802
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Broken by 3dedcd1640 but we don't have CI coverage yet.
Updates #3157
Change-Id: Ie8e95ebd36264887fdeed16fc9f25a857d48124b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This fixes the "tailscale up --authkey=... --ssh" path (or any "up"
path that used Start instead of EditPrefs) which wasn't setting the
bit.
Updates #3802
Change-Id: Ifca532ec58296fedcedb5582312dfee884367ed7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Currently, when SetNetInfo is called it sets the value on
hostinfo.NetInfo. However, when SetHostInfo is called it overwrites the
hostinfo field which may mean it also clears out the NetInfo it had just
received.
This commit stores NetInfo separately and combines it into Hostinfo as
needed so that control is always notified of the latest values.
Also, remove unused copies of Hostinfo from ipn.Status and
controlclient.Auto.
Updates #tailscale/corp#4824 (maybe fixes)
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Currently the ssh session isn't terminated cleanly, instead the packets
are just are no longer routed to the in-proc SSH server. This makes it
so that clients get a disconnection when the `RunSSH` pref changes to
`false`.
Updates #3802
Signed-off-by: Maisem Ali <maisem@tailscale.com>
No callers remain (last one was removed with
tailscale/corp@1c095ae08f), and it's
pretty esoteric.
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
The Mac client was using it, but it had the effect of the `RouteAll`
("Use Tailscale subnets") pref always being enabled at startup,
regardless of the persisted value.
enforceDefaults was added to handle cases from ~2 years ago where
we ended up with persisted `"RouteAll": false` values in the keychain,
but that should no longer be a concern. New users will get the default
of it being enabled via `NewPrefs`.
There will be a corresponding Mac client change to stop passing in
enforceDefaults.
For #3962
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
The connections returned from SystemDial are automatically closed when
there is a major link change.
Also plumb through the dialer to the noise client so that connections
are auto-reset when moving from cellular to WiFi etc.
Updates #3363
Signed-off-by: Maisem Ali <maisem@tailscale.com>
No CLI support yet. Just the curl'able version if you know the peerapi
port. (like via a TSMP ping)
Updates #306
Change-Id: I0662ba6530f7ab58d0ddb24e3664167fcd1c4bcf
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
I've done this a handful of times in the past and again today.
Time to make it a supported thing for the future.
Used while debugging tailscale/corp#4559 (macsys CLI issues)
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
For tests.
Now that we can always listen (whereas we used to fail prior to
a2c330c496), some goroutine leak
checks were failing in tests in another repo after that change.
Change-Id: Id95a4b71167eca61962a48616d79741b9991e0bc
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The previous commit (1b89662eff) this for Android, but we can also use
this on any platform if we we would otherwise fail.
Change-Id: I4cd78b40e9e77fca5cc8e717dd48ac173101bed4
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We intercept the peerapi port in netstack anyway, so there's no reason
the linux kernel on Android needs to know about it. It's only getting
in the way and causing problems for reasons we don't fully understand.
But we don't even need to understand it because it's not relevant
anymore.
Instead, provide a dummy net.Listener that just sits and blocks to
pacify the rest of the code that assumes it can be stuck in a
Listener.Accept call and call Listener.Close and Listener.Addr.
We'll likely do this for all platforms in the future, if/when we also
link in netstack on iOS.
Updates #4449
Updates #4293
Updates #3986
Change-Id: Ic2d3fe2f3cee60fc527356a3368830f17aeb75ae
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Two changes in one:
* make DoH upgrades an explicitly scheduled send earlier, when we come
up with the resolvers-and-delay send plan. Previously we were
getting e.g. four Google DNS IPs and then spreading them out in
time (for back when we only did UDP) but then later we added DoH
upgrading at the UDP packet layer, which resulted in sometimes
multiple DoH queries to the same provider running (each doing happy
eyeballs dialing to 4x IPs themselves) for each of the 4 source IPs.
Instead, take those 4 Google/Cloudflare IPs and schedule 5 things:
first the DoH query (which can use all 4 IPs), and then each of the
4 IPs as UDP later.
* clean up the dnstype.Resolver.Addr confusion; half the code was
using it as an IP string (as documented) as half was using it as
an IP:port (from some prior type we used), primarily for tests.
Instead, document it was being primarily an IP string but also
accepting an IP:port for tests, then add an accessor method on it
to get the IPPort and use that consistently everywhere.
Change-Id: Ifdd72b9e45433a5b9c029194d50db2b9f9217b53
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
The default is still users can debug their own nodes. But like
cd916b728b did, this adds support for admins to grant additional
capabilities with the new tailcfg.CapabilityDebugPeer cap.
Updates #4217
Change-Id: Ifce3d9a1f8e8845797970a4f97b393194663d35f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Fail on unsupported platforms (must be Linux or macOS tailscaled with
WIP env) or when disabled by admin (with TS_DISABLE_SSH_SERVER=1)
Updates #3802
Change-Id: I5ba191ed0d8ba4ddabe9b8fc1c6a0ead8754b286
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
And rename to updateFilterLocked to prevent future mistakes.
Fixes#4427
Change-Id: I4d37b90027d5ff872a339ce8180f5723704848dc
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Controlled by server-sent capability policy.
To be initially used for SSH servers to record sessions to other
nodes. Not yet productized into something user-accessible. (Notably,
the list of Taildrop targets from the sender side isn't augmented
yet.) This purely permits expanding the set of expands a node will
accept a drop from.
Updates #3802
Updates #4217
Change-Id: Id7a5bccd686490f8ef2cdc7dae7c07c440dc0085
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
tailcfg.PingResponse formalizes the TSMP & disco response message, and
controlclient is wired to send POST responses containing
tailcfg.PingResponse for TSMP and disco PingRequests.
Updates tailscale/corp#754
Signed-off-by: James Tucker <james@tailscale.com>
Remove the weird netstack -> tailssh dependency and instead have tailssh
register itself with ipnlocal when linked.
This makes tailssh.server a singleton, so we can have a global map of
all sessions.
Updates #3802
Change-Id: Iad5caec3a26a33011796878ab66b8e7b49339f29
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Currently peerIPs doesn't do any sorting of the routes it returns. This
is typically fine, however imagine the case of an HA subnet router
failover. When a route R moves from peer A to peer B, the output of
peerIPs changes. This in turn causes all the deephash check inside
wgengine to fail as the hashed value of [R1, R2] is different than
the hashed value of [R2, R1]. When the hash check failes, it causes
wgengine to reconfigure all routes in the OS. This is especially
problematic for macOS and iOS where we use the NetworkExtension.
This commit makes it that the peerIPs are always sorted when returned,
thus making the hash be consistent as long as the list of routes remains
static.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
This defines a new magic IPv6 prefix, fd7a:115c:a1e0:b1a::/64, a
subset of our existing /48, where the final 32 bits are an IPv4
address, and the middle 32 bits are a user-chosen "site ID". (which
must currently be 0000:00xx; the top 3 bytes must be zero for now)
e.g., I can say my home LAN's "site ID" is "0000:00bb" and then
advertise its 10.2.0.0/16 IPv4 range via IPv6, like:
tailscale up --advertise-routes=fd7a:115c:a1e0:b1a::bb:10.2.0.0/112
(112 being /128 minuse the /96 v6 prefix length)
Then people in my tailnet can:
$ curl '[fd7a:115c:a1e0:b1a::bb:10.2.0.230]'
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ....
Updates #3616, etc
RELNOTE=initial support for TS IPv6 addresses to route v4 "via" specific nodes
Change-Id: I9b49b6ad10410a24b5866b9fbc69d3cae1f600ef
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Combine the code between `LocalBackend.CheckIPForwarding` and
`controlclient.ipForwardingBroken`.
Fixes#4300
Signed-off-by: Maisem Ali <maisem@tailscale.com>
While we rearrange/upstream things.
gliderlabs/ssh is forked into tempfork from our prior fork
at be8b7add40
x/crypto/ssh OTOH is forked at
https://github.com/tailscale/golang-x-crypto because it was gnarlier
to vendor with various internal packages, etc.
Its git history shows where it starts (2c7772ba30643b7a2026cbea938420dce7c6384d).
Updates #3802
Change-Id: I546e5cdf831cfc030a6c42557c0ad2c58766c65f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
When `setWgengineStatus` is invoked concurrently from multiple
goroutines, it is possible that the call invoked with a newer status is
processed before a call with an older status. e.g. a status that has
endpoints might be followed by a status without endpoints. This causes
unnecessary work in the engine and can result in packet loss.
This patch adds an `AsOf time.Time` field to the status to specifiy when the
status was calculated, which later allows `setWgengineStatus` to ignore
any status messages it receives that are older than the one it has
already processed.
Updates tailscale/corp#2579
Signed-off-by: Maisem Ali <maisem@tailscale.com>
This adds a "tailscale nc" command that acts a bit like "nc", but
dials out via tailscaled via localapi.
This is a step towards a "tailscale ssh", as we'll use "tailscale nc"
as a ProxyCommand for in some cases (notably in userspace mode).
But this is also just useful for debugging & scripting.
Updates #3802
RELNOTE=tailscale nc
Change-Id: Ia5c37af2d51dd0259d5833d80264d3ad5f68446a
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Also make IPPrefixSliceOf use Slice[netaddr.IPPrefix] as it also
provides additional functions besides the standard ones provided by
Slice[T].
Signed-off-by: Maisem Ali <maisem@tailscale.com>
We need to be able to provide the ability for the GUI clients to resolve and set
the exit node IP from an untrusted string, thus enabling the ability to specify
that information via enterprise policy.
This patch moves the relevant code out of the handler for `tailscale up`,
into a method on `Prefs` that may then be called by GUI clients.
We also update tests accordingly.
Updates https://github.com/tailscale/corp/issues/4239
Signed-off-by: Aaron Klotz <aaron@tailscale.com>
And add a CapabilityVersion type, primarily for documentation.
This makes MapRequest.Version, RegisterRequest.Version, and
SetDNSRequest.Version all use the same version, which will avoid
confusing in the future if Register or SetDNS ever changed their
semantics on Version change. (Currently they're both always 1)
This will requre a control server change to allow a
SetDNSRequest.Version value other than 1 to be deployed first.
Change-Id: I073042a216e0d745f52ee2dbc45cf336b9f84b7c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Otherwise it would log warnings about an empty file.
```
stores.go:138: store.NewFileStore("/tmp/3777352782"): file empty; treating it like a missing file [warning]
```
Signed-off-by: Maisem Ali <maisem@tailscale.com>
Also move KubeStore and MemStore into their own package.
RELNOTE: tsnet now supports providing a custom ipn.StateStore.
Signed-off-by: Maisem Ali <maisem@tailscale.com>
For local dev testing initially. Product-wise, it'll probably only be
workable on the two unsandboxed builds.
Updates #3802
Change-Id: Ic352f966e7fb29aff897217d79b383131bf3f92b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
I introduced a bug in 8fe503057d when unifying oneConnListener
implementations.
The NewOneConnListenerFrom API was easy to misuse (its Close method
closes the underlying Listener), and we did (via http.Serve, which
closes the listener after use, which meant we were close the peerapi's
listener, even though we only wanted its Addr)
Instead, combine those two constructors into one and pass in the Addr
explicitly, without delegating through to any Listener.
Change-Id: I061d7e5f842e0cada416e7b2dd62100d4f987125
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Don't make users map their system's "caddy" (or whatever) system user
to its userid. We can do that. Support either a uid or a username.
RELNOTE=TS_PERMIT_CERT_UID can contain a uid or username
Change-Id: I7451b537a5e118b818addf1353882291d5f0d07f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
e.g. the change to ipnlocal in this commit ultimately logs out:
{"logtail":{"client_time":"2022-02-17T20:40:30.511381153-08:00","server_time":"2022-02-18T04:40:31.057771504Z"},"type":"Hostinfo","val":{"GoArch":"amd64","Hostname":"tsdev","IPNVersion":"1.21.0-date.20220107","OS":"linux","OSVersion":"Debian 11.2 (bullseye); kernel=5.10.0-10-amd64"},"v":1}
Change-Id: I668646b19aeae4a2fed05170d7b279456829c844
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
(The name SSH_HostKeys is bad but SSHHostKeys is worse.)
Updates #3802
Change-Id: I2a889019c9e8b065b668dd58140db4fcab868a91
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Make tailssh ask LocalBackend for the SSH hostkeys, as we'll need to
distribute them to peers.
For now only the hacky use-same-as-actual-host mode is implemented.
Updates #3802
Change-Id: I819dcb25c14e42e6692c441186c1dc744441592b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
