Commit Graph

5578 Commits (ba4e58f429029d1b8d51967aa71ccf3bf36de278)
 

Author SHA1 Message Date
Maisem Ali 09d0b632d4 ssh/tailssh: add session recording test for non-pty sessions
Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali d39a5e4417 tsnet: support TS_AUTH_KEY variant too
Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali d2fd101eb4 net/tstun: only log natConfig on changes
Updates tailscale/corp#8020

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 8ac5976897 logpolicy: do not upload logs in tests
Fixes tailscale/corp#10030

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 7300b908fb logpolicy: split out DialContext into a func
Updates tailscale/corp#10030

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali ca19cf13e9 log/sockstatlog: add resource cleanup test
Updates tailscale/corp#10030

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Andrew Dunham 33b359642e net/dns: don't send on closed channel in resolvedManager
Fixes #7686

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ibffb05539ab876b12407d77dcf2201d467895981
2 years ago
Anton Tolchanov 6f9aed1656 scripts: use pkg server to determine supported deb/rpm distros
Fixes https://github.com/tailscale/corp/issues/8952

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago
Andrew Dunham 4cb1bfee44 net/netcheck: improve determinism in hairpinning test
If multiple Go channels have a value (or are closed), receiving from
them all in a select will nondeterministically return one of the two
arms. In this case, it's possible that the hairpin check timer will have
expired between when we start checking and before we check at all, but
the hairpin packet has already been received. In such cases, we'd
nondeterministically set report.HairPinning.

Instead, check if we have a value in our results channel first, then
select on the value and timeout channel after. Also, add a test that
catches this particular failure.

Fixes #1795

Change-Id: I842ab0bd38d66fabc6cabf2c2c1bb9bd32febf35
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
2 years ago
Maisem Ali 4a89642f7f log/sockstatlog: make shutdown close idle connections
Updates tailscale/corp#10030

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 9e81db50f6 ipn/ipnlocal: use atomicfile.WriteFile in certFileStore
Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 8a11f76a0d ipn/ipnlocal: fix cert storage in Kubernetes
We were checking against the wrong directory, instead if we
have a custom store configured just use that.

Fixes #7588
Fixes #7665

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali ec90522a53 ipn/ipnlocal: also store ACME keys in the certStore
We were not storing the ACME keys in the state store, they would always
be stored on disk.

Updates #7588

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 0e203e414f net/packet: add checksum update tests
Updates tailscale/corp#8020

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 0bf8c8e710 net/tstun: use p.Buffer() in more places
Updates tailscale/corp#8020

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali f6ea6863de tstest/integration: add ping test w/ masquerades
Updates tailscale/corp#8020

Co-authored-by: Melanie Warrick <warrick@tailscale.com>
Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali bb31fd7d1c net/tstun: add inital support for NAT v4
This adds support in tstun to utitilize the SelfNodeV4MasqAddrForThisPeer and
perform the necessary modifications to the packet as it passes through tstun.

Currently this only handles ICMP, UDP and TCP traffic.
Subnet routers and Exit Nodes are also unsupported.

Updates tailscale/corp#8020

Co-authored-by: Melanie Warrick <warrick@tailscale.com>
Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 535fad16f8 net/tstun: rename filterIn/filterOut methods to be more descriptive
Updates tailscale/corp#8020

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali f61b306133 tailcfg: add Node.SelfNodeV4MasqAddrForThisPeer
This only adds the field, to be used in a future commit.

Updates tailscale/corp#8020

Co-authored-by: Melanie Warrick <warrick@tailscale.com>
Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 583e86b7df ssh/tailssh: handle session recording when running in userspace mode
Previously it would dial out using the http.DefaultClient, however that doesn't work
when tailscaled is running in userspace mode (e.g. when testing).

Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali df89b7de10 cmd/k8s-operator: disable HTTP/2 for the auth proxy
Kubernetes uses SPDY/3.1 which is incompatible with HTTP/2, disable it
in the transport and server.

Fixes #7645
Fixes #7646

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 8a246487c2 ssh/tailssh: enable recording of non-pty sessions
Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 8765568373 ssh/tailssh: add docs to CastHeader fields
Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 9d8b7a7383 ipn/store/kubestore: handle "/" in ipn.StateKeys
Kubernetes doesn't allow slashes as keys in secrets, replace them with "__".

This shows up in the kubernetes-operator now that tsnet sets resets the ServeConfig
at startup.

Fixes #7662

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Will Norris 57a008a1e1 all: pass log IDs as the proper type rather than strings
This change focuses on the backend log ID, which is the mostly commonly
used in the client.  Tests which don't seem to make use of the log ID
just use the zero value.

Signed-off-by: Will Norris <will@tailscale.com>
2 years ago
Andrew Dunham 13377e6458 ssh/tailssh: always assert our final uid/gid
Move the assertions about our post-privilege-drop UID/GID out of the
conditional if statement and always run them; I haven't been able to
find a case where this would fail. Defensively add an envknob to disable
this feature, however, which we can remove after the 1.40 release.

Updates #7616

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Iaec3dba9248131920204bd6c6d34bbc57a148185
2 years ago
Andrew Dunham 9de8287d47 ssh/tailssh: lock OS thread during incubator
This makes it less likely that we trip over bugs like golang/go#1435.

Updates #7616

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ic28c03c3ad8ed5274a795c766b767fa876029f0e
2 years ago
Maisem Ali c350cd1f06 ssh/tailssh: use background context for uploading recordings
Otherwise we see errors like
```
ssh-session(sess-20230322T005655-5562985593): recording: error sending recording to <addr>:80: Post "http://<addr>:80/record": context canceled
```

The ss.ctx is closed when the session closes, but we don't want to break the upload at that time. Instead we want to wait for the session to
close the writer when it finishes, which it is already doing.

Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Will Norris f13b8bf0cf log: use logtail to log and upload sockstat logs
Switch to using logtail for logging sockstat logs. Always log locally
(on supported platforms), but disable automatic uploading.  Change
existing c2n sockstats request to trigger upload to log server and
return log ID.

Signed-off-by: Will Norris <will@tailscale.com>
2 years ago
Mihai Parparita 731688e5cc ipn/localapi: add endpoint for adding debug log entries
Allows the iOS and macOS apps to include their frontend logs when
generating bug reports (tailscale/corp#9982).

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Anton Tolchanov 7083246409 prober: only record latency for successful probes
This will make it easier to track probe latency on a dashboard.

Updates https://github.com/tailscale/corp/issues/9916

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago
Maisem Ali d92047cc30 ssh/tailssh: allow recorders to be configured on the first or final action
Currently we only send down recorders in first action, allow the final action
to replace them but not to drop them.

Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Maisem Ali 7a97e64ef0 ssh/tailssh: add more metadata to recording header
Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Denton Gentry cc3806056f scripts/installer.sh: Add Ubuntu Lunar Lobster 23.04.
pkgs.tailscale.com added support in January, need to
add it to the installer script.

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
2 years ago
Maisem Ali 916aa782af ssh/tailssh: stream SSH recordings to configured recorders
Updates tailscale/corp#9967

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
Tom DNetto 60cd4ac08d cmd/tailscale/cli: move tskey-wrap functionality under lock sign
Signed-off-by: Tom DNetto <tom@tailscale.com>
2 years ago
Charlotte Brandhorst-Satzkorn 1b78dc1f33 tailcfg: move recorders field from SSHRule to SSHAction
Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
2 years ago
Charlotte Brandhorst-Satzkorn 3efd83555f tailcfg: add recorders field to SSHRule struct
This change introduces the Recorders field to the SSHRule struct. The
field is used to store and define addresses where the ssh recorder is
located.

Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
2 years ago
Sam Linville 812025a39c
words: what?! a llama?! he's supposed to be dead! (#7623)
pull the lever, kronk

Signed-off-by: Sam Linville <samlinville@protonmail.com>
2 years ago
Andrew Dunham 39b289578e ssh/tailssh: make uid an int instead of uint64
Follow-up to #7615

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ib4256bff276f6d5cf95838d8e39c87b3643bde37
2 years ago
David Anderson c9a4dbe383 tool/gocross: correctly embed the git commit into gocross
Previously, the build ended up embedding an empty string, which made
the shell wrapper rebuild gocross on every invocation. This is still
reasonably fast, but fixing the bypass shaves 80% off gocross's overhead
when no rebuild is needed.

Signed-off-by: David Anderson <danderson@tailscale.com>
2 years ago
Brad Fitzpatrick f11c270c6b go.toolchain.rev: bump Go toolchain
For tailscale/go#60

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Mihai Parparita d2dec13392 net/sockstats: export cellular-only clientmetrics
Followup to #7518 to also export client metrics when the active interface
is cellular.

Updates tailscale/corp#9230
Updates #3363

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
David Anderson e7a78bc28f tool/gocross: support running from outside the repo dir
A bunch of us invoke tool/go from outside the repo that hosts gocross,
as a way of accessing our version-controlled toolchain. This removes
assumptions from gocross that it's being invoked within the repository
that contains its source code and toolchain configuration.

Fixes tailscale/corp#9627

Signed-off-by: David Anderson <danderson@tailscale.com>
2 years ago
David Anderson df02bb013a tool/gocross: fail if the toolchain revision isn't findable
This used to make sense, but after a refactor somewhere along the line
this results in trying to download from a malformed URL and generally
confusing failures.

Signed-off-by: David Anderson <danderson@tailscale.com>
2 years ago
Denton Gentry ebc630c6c0 net/interfaces: also allow link-local for AzureAppServices.
In May 2021, Azure App Services used 172.16.x.x addresses:
```
10: eth0@if11: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
    link/ether 02:42:ac:10:01:03 brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.3/24 brd 172.16.1.255 scope global eth0
       valid_lft forever preferred_lft forever
```

Now it uses link-local:
```
2: eth0@if6: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
    link/ether 8a:30:1f:50:1d:23 brd ff:ff:ff:ff:ff:ff
    inet 169.254.129.3/24 brd 169.254.129.255 scope global eth0
       valid_lft forever preferred_lft forever
```

This is reasonable for them to choose to do, it just broke the handling in net/interfaces.

This PR proposes to:
1. Always allow link-local in LocalAddresses() if we have no better
   address available.
2. Continue to make isUsableV4() conditional on an environment we know
   requires it.

I don't love the idea of having to discover these environments one by
one, but I don't understand the consequences of making isUsableV4()
return true unconditionally. It makes isUsableV4() essentially always
return true and perform no function.

Fixes https://github.com/tailscale/tailscale/issues/7603

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
2 years ago
Andrew Dunham ccace1f7df ssh/tailssh: fix privilege dropping on FreeBSD; add tests
On FreeBSD and Darwin, changing a process's supplementary groups with
setgroups(2) will also change the egid of the process, setting it to the
first entry in the provided list. This is distinct from the behaviour on
other platforms (and possibly a violation of the POSIX standard).

Because of this, on FreeBSD with no TTY, our incubator code would
previously not change the process's gid, because it would read the
newly-changed egid, compare it against the expected egid, and since they
matched, not change the gid. Because we didn't use the 'login' program
on FreeBSD without a TTY, this would propagate to a child process.

This could be observed by running "id -p" in two contexts. The expected
output, and the output returned when running from a SSH shell, is:

    andrew@freebsd:~ $ id -p
    uid         andrew
    groups      andrew

However, when run via "ssh andrew@freebsd id -p", the output would be:

    $ ssh andrew@freebsd id -p
    login       root
    uid         andrew
    rgid        wheel
    groups      andrew

(this could also be observed via "id -g -r" to print just the gid)

We fix this by pulling the details of privilege dropping out into their
own function and prepending the expected gid to the start of the list on
Darwin and FreeBSD.

Finally, we add some tests that run a child process, drop privileges,
and assert that the final UID/GID/additional groups are what we expect.

More information can be found in the following article:
    https://www.usenix.org/system/files/login/articles/325-tsafrir.pdf

Updates #7616
Alternative to #7609

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I0e6513c31b121108b50fe561c89e5816d84a45b9
2 years ago
Mihai Parparita e1fb687104 cmd/tailscale/cli: fix inconsistency between serve text and example command
Use the same local port number in both, and be more precise about what
is being forwarded

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Anton Tolchanov 654b5a0616 derp: add optional debug logging for prober clients
This allows tracking packet flow via logs for prober clients. Note that
the new sclient.debug() function is called on every received packet, but
will do nothing for most clients.

I have adjusted sclient logging to print public keys in short format
rather than full. This takes effect even for existing non-debug logging
(mostly client disconnect messages).

Example logs for a packet being sent from client [SbsJn] (connected to
derper [dM2E3]) to client [10WOo] (connected to derper [AVxvv]):

```
derper [dM2E3]:
derp client 10.0.0.1:35470[SbsJn]: register single client mesh("10.0.1.1"): 4 peers
derp client 10.0.0.1:35470[SbsJn]: read frame type 4 len 40 err <nil>
derp client 10.0.0.1:35470[SbsJn]: SendPacket for [10WOo], forwarding via <derphttp_client.Client [AVxvv] url=https://10.0.1.1/derp>: <nil>
derp client 10.0.0.1:35470[SbsJn]: read frame type 0 len 0 err EOF
derp client 10.0.0.1:35470[SbsJn]: read EOF
derp client 10.0.0.1:35470[SbsJn]: sender failed: context canceled
derp client 10.0.0.1:35470[SbsJn]: removing connection

derper [AVxvv]:
derp client 10.0.1.1:50650[10WOo]: register single client
derp client 10.0.1.1:50650[10WOo]: received forwarded packet from [SbsJn] via [dM2E3]
derp client 10.0.1.1:50650[10WOo]: sendPkt attempt 0 enqueued
derp client 10.0.1.1:50650[10WOo]: sendPacket from [SbsJn]: <nil>
derp client 10.0.1.1:50650[10WOo]: read frame type 0 len 0 err EOF
derp client 10.0.1.1:50650[10WOo]: read EOF
derp client 10.0.1.1:50650[10WOo]: sender failed: context canceled
derp client 10.0.1.1:50650[10WOo]: removing connection
```

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago
Anton Tolchanov 50d211d1a4 cmd/derpprobe: allow running all probes at the same time
This allows disabling spread mode, which is helpful if you are manually
running derpprobe in `--once` mode against a small number of DERP
machines.

Updates https://github.com/tailscale/corp/issues/9916

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago