In case we received a newly nominated socket from `str0m` whilst our
connection was in idle mode, we mistakenly did not apply that and kept
using the old one. ICE would still be functioning in this case because
`str0m` would have updated its internal state but we would be sending
packets into Nirvana.
I don't think that this is likely to be hit in production though as it
would be quite unusual to receive a new nomination whilst the connection
was completely idle.
When encrypting IP packets, `snownet` needs to prepare a buffer where
the encrypted packet is going to end up. Depending on whether we are
sending data via a relayed connection or direct, this buffer needs to be
offset by 4 bytes to allow for the 4-byte channel-data header of the
TURN protocol.
At present, we always first encrypt the packet and then on-demand move
the packet by 4-bytes to the left if we **don't** need to send it via a
relay. Internally, this translates to a `memmove` instruction which
actually turns out to be very cheap (I couldn't measure a speed
difference between this and `main`).
All of this code has grown historically though so I figured, it is
better to clean it up a bit to first evaluate, whether we have a direct
or relayed connection and based on that, write the encrypted packet
directly to the front of the buffer or offset it by 4 bytes.
Profiling has shown that using a spinlock-based buffer pool is
marginally (~1%) faster than the mutex-based one because it resolves
contention quicker.
Profiling has shown that checking whether the level is enabled is
actually more expensive than checking whether the packet is a DNS
packet. This improves performance by about 3%.
These are flooding our monitoring infra and don't really add that much
value. Pretty much all of the processing the relay does is request in
and out and none of the spans are nested.
We can therefore almost 1-to-1 replicate the logging we do with spans by
adding the fields to each log message.
Resolves: #9954
Bumps the sentry group in /rust/gui-client with 2 updates:
[@sentry/core](https://github.com/getsentry/sentry-javascript) and
[@sentry/react](https://github.com/getsentry/sentry-javascript).
Updates `@sentry/core` from 9.34.0 to 9.40.0
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/getsentry/sentry-javascript/releases"><code>@sentry/core</code>'s
releases</a>.</em></p>
<blockquote>
<h2>9.40.0</h2>
<h3>Important Changes</h3>
<ul>
<li><strong>feat(browser): Add debugId sync APIs between web worker and
main thread (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/16981">#16981</a>)</strong></li>
</ul>
<p>This release adds two Browser SDK APIs to let the main thread know
about debugIds of worker files:</p>
<ul>
<li><code>webWorkerIntegration({worker})</code> to be used in the main
thread</li>
<li><code>registerWebWorker({self})</code> to be used in the web
worker</li>
</ul>
<pre lang="js"><code>// main.js
Sentry.init({...})
<p>const worker = new MyWorker(...);</p>
<p>Sentry.addIntegration(Sentry.webWorkerIntegration({ worker }));</p>
<p>worker.addEventListener('message', e => {...});<br />
</code></pre></p>
<pre lang="js"><code>// worker.js
Sentry.registerWebWorker({ self });
self.postMessage(...);
</code></pre>
<ul>
<li><strong>feat(core): Deprecate logger in favor of debug (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17040">#17040</a>)</strong></li>
</ul>
<p>The internal SDK <code>logger</code> export from
<code>@sentry/core</code> has been deprecated in favor of the
<code>debug</code> export. <code>debug</code> only exposes
<code>log</code>, <code>warn</code>, and <code>error</code> methods but
is otherwise identical to <code>logger</code>. Note that this
deprecation does not affect the <code>logger</code> export from other
packages (like <code>@sentry/browser</code> or
<code>@sentry/node</code>) which is used for Sentry Logging.</p>
<pre lang="js"><code>import { logger, debug } from '@sentry/core';
<p>// before<br />
logger.info('This is an info message');</p>
<p>// after<br />
debug.log('This is an info message');<br />
</code></pre></p>
<ul>
<li><strong>feat(node): Add OpenAI integration (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17022">#17022</a>)</strong></li>
</ul>
<p>This release adds official support for instrumenting OpenAI SDK calls
in with Sentry tracing, following OpenTelemetry semantic conventions for
Generative AI. It instruments:</p>
<ul>
<li><code>client.chat.completions.create()</code> - For chat-based
completions</li>
<li><code>client.responses.create()</code> - For the responses API</li>
</ul>
<pre lang="js"><code></tr></table>
</code></pre>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/getsentry/sentry-javascript/blob/develop/CHANGELOG.md"><code>@sentry/core</code>'s
changelog</a>.</em></p>
<blockquote>
<h2>9.40.0</h2>
<h3>Important Changes</h3>
<ul>
<li><strong>feat(browser): Add debugId sync APIs between web worker and
main thread (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/16981">#16981</a>)</strong></li>
</ul>
<p>This release adds two Browser SDK APIs to let the main thread know
about debugIds of worker files:</p>
<ul>
<li><code>webWorkerIntegration({worker})</code> to be used in the main
thread</li>
<li><code>registerWebWorker({self})</code> to be used in the web
worker</li>
</ul>
<pre lang="js"><code>// main.js
Sentry.init({...})
<p>const worker = new MyWorker(...);</p>
<p>Sentry.addIntegration(Sentry.webWorkerIntegration({ worker }));</p>
<p>worker.addEventListener('message', e => {...});<br />
</code></pre></p>
<pre lang="js"><code>// worker.js
Sentry.registerWebWorker({ self });
self.postMessage(...);
</code></pre>
<ul>
<li><strong>feat(core): Deprecate logger in favor of debug (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17040">#17040</a>)</strong></li>
</ul>
<p>The internal SDK <code>logger</code> export from
<code>@sentry/core</code> has been deprecated in favor of the
<code>debug</code> export. <code>debug</code> only exposes
<code>log</code>, <code>warn</code>, and <code>error</code> methods but
is otherwise identical to <code>logger</code>. Note that this
deprecation does not affect the <code>logger</code> export from other
packages (like <code>@sentry/browser</code> or
<code>@sentry/node</code>) which is used for Sentry Logging.</p>
<pre lang="js"><code>import { logger, debug } from '@sentry/core';
<p>// before<br />
logger.info('This is an info message');</p>
<p>// after<br />
debug.log('This is an info message');<br />
</code></pre></p>
<ul>
<li><strong>feat(node): Add OpenAI integration (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17022">#17022</a>)</strong></li>
</ul>
<p>This release adds official support for instrumenting OpenAI SDK calls
in with Sentry tracing, following OpenTelemetry semantic conventions for
Generative AI. It instruments:</p>
<ul>
<li><code>client.chat.completions.create()</code> - For chat-based
completions</li>
<li><code>client.responses.create()</code> - For the responses API</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="cc51366965"><code>cc51366</code></a>
release: 9.40.0</li>
<li><a
href="a12c5a6ff6"><code>a12c5a6</code></a>
Merge pull request <a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17039">#17039</a>
from getsentry/prepare-release/9.40.0</li>
<li><a
href="d4ab7c09c1"><code>d4ab7c0</code></a>
meta(changelog): Update changelog for 9.40.0</li>
<li><a
href="f538ef024c"><code>f538ef0</code></a>
feat(node): Add OpenAI integration (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17022">#17022</a>)</li>
<li><a
href="53199420c4"><code>5319942</code></a>
feat(node-core): Expand <code>@opentelemetry/instrumentation</code>
range to cover `0.20...</li>
<li><a
href="962d6973cc"><code>962d697</code></a>
fix(core): Add missing <code>SentryDebugLogger</code> type export (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17046">#17046</a>)</li>
<li><a
href="779c15995c"><code>779c159</code></a>
chore(test-registry): Add more descriptive error code for common error
(<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/16790">#16790</a>)</li>
<li><a
href="6116610341"><code>6116610</code></a>
chore: Add external contributor to CHANGELOG.md (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17052">#17052</a>)</li>
<li><a
href="14c5d444cc"><code>14c5d44</code></a>
test(react): Pin react-router version for e2e test (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17051">#17051</a>)</li>
<li><a
href="163798656a"><code>1637986</code></a>
docs(bun): remove advice concerning unhandled exceptions (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17049">#17049</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/getsentry/sentry-javascript/compare/9.34.0...9.40.0">compare
view</a></li>
</ul>
</details>
<br />
Updates `@sentry/react` from 9.34.0 to 9.40.0
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/getsentry/sentry-javascript/releases"><code>@sentry/react</code>'s
releases</a>.</em></p>
<blockquote>
<h2>9.40.0</h2>
<h3>Important Changes</h3>
<ul>
<li><strong>feat(browser): Add debugId sync APIs between web worker and
main thread (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/16981">#16981</a>)</strong></li>
</ul>
<p>This release adds two Browser SDK APIs to let the main thread know
about debugIds of worker files:</p>
<ul>
<li><code>webWorkerIntegration({worker})</code> to be used in the main
thread</li>
<li><code>registerWebWorker({self})</code> to be used in the web
worker</li>
</ul>
<pre lang="js"><code>// main.js
Sentry.init({...})
<p>const worker = new MyWorker(...);</p>
<p>Sentry.addIntegration(Sentry.webWorkerIntegration({ worker }));</p>
<p>worker.addEventListener('message', e => {...});<br />
</code></pre></p>
<pre lang="js"><code>// worker.js
Sentry.registerWebWorker({ self });
self.postMessage(...);
</code></pre>
<ul>
<li><strong>feat(core): Deprecate logger in favor of debug (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17040">#17040</a>)</strong></li>
</ul>
<p>The internal SDK <code>logger</code> export from
<code>@sentry/core</code> has been deprecated in favor of the
<code>debug</code> export. <code>debug</code> only exposes
<code>log</code>, <code>warn</code>, and <code>error</code> methods but
is otherwise identical to <code>logger</code>. Note that this
deprecation does not affect the <code>logger</code> export from other
packages (like <code>@sentry/browser</code> or
<code>@sentry/node</code>) which is used for Sentry Logging.</p>
<pre lang="js"><code>import { logger, debug } from '@sentry/core';
<p>// before<br />
logger.info('This is an info message');</p>
<p>// after<br />
debug.log('This is an info message');<br />
</code></pre></p>
<ul>
<li><strong>feat(node): Add OpenAI integration (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17022">#17022</a>)</strong></li>
</ul>
<p>This release adds official support for instrumenting OpenAI SDK calls
in with Sentry tracing, following OpenTelemetry semantic conventions for
Generative AI. It instruments:</p>
<ul>
<li><code>client.chat.completions.create()</code> - For chat-based
completions</li>
<li><code>client.responses.create()</code> - For the responses API</li>
</ul>
<pre lang="js"><code></tr></table>
</code></pre>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/getsentry/sentry-javascript/blob/develop/CHANGELOG.md"><code>@sentry/react</code>'s
changelog</a>.</em></p>
<blockquote>
<h2>9.40.0</h2>
<h3>Important Changes</h3>
<ul>
<li><strong>feat(browser): Add debugId sync APIs between web worker and
main thread (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/16981">#16981</a>)</strong></li>
</ul>
<p>This release adds two Browser SDK APIs to let the main thread know
about debugIds of worker files:</p>
<ul>
<li><code>webWorkerIntegration({worker})</code> to be used in the main
thread</li>
<li><code>registerWebWorker({self})</code> to be used in the web
worker</li>
</ul>
<pre lang="js"><code>// main.js
Sentry.init({...})
<p>const worker = new MyWorker(...);</p>
<p>Sentry.addIntegration(Sentry.webWorkerIntegration({ worker }));</p>
<p>worker.addEventListener('message', e => {...});<br />
</code></pre></p>
<pre lang="js"><code>// worker.js
Sentry.registerWebWorker({ self });
self.postMessage(...);
</code></pre>
<ul>
<li><strong>feat(core): Deprecate logger in favor of debug (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17040">#17040</a>)</strong></li>
</ul>
<p>The internal SDK <code>logger</code> export from
<code>@sentry/core</code> has been deprecated in favor of the
<code>debug</code> export. <code>debug</code> only exposes
<code>log</code>, <code>warn</code>, and <code>error</code> methods but
is otherwise identical to <code>logger</code>. Note that this
deprecation does not affect the <code>logger</code> export from other
packages (like <code>@sentry/browser</code> or
<code>@sentry/node</code>) which is used for Sentry Logging.</p>
<pre lang="js"><code>import { logger, debug } from '@sentry/core';
<p>// before<br />
logger.info('This is an info message');</p>
<p>// after<br />
debug.log('This is an info message');<br />
</code></pre></p>
<ul>
<li><strong>feat(node): Add OpenAI integration (<a
href="https://redirect.github.com/getsentry/sentry-javascript/pull/17022">#17022</a>)</strong></li>
</ul>
<p>This release adds official support for instrumenting OpenAI SDK calls
in with Sentry tracing, following OpenTelemetry semantic conventions for
Generative AI. It instruments:</p>
<ul>
<li><code>client.chat.completions.create()</code> - For chat-based
completions</li>
<li><code>client.responses.create()</code> - For the responses API</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="cc51366965"><code>cc51366</code></a>
release: 9.40.0</li>
<li><a
href="a12c5a6ff6"><code>a12c5a6</code></a>
Merge pull request <a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17039">#17039</a>
from getsentry/prepare-release/9.40.0</li>
<li><a
href="d4ab7c09c1"><code>d4ab7c0</code></a>
meta(changelog): Update changelog for 9.40.0</li>
<li><a
href="f538ef024c"><code>f538ef0</code></a>
feat(node): Add OpenAI integration (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17022">#17022</a>)</li>
<li><a
href="53199420c4"><code>5319942</code></a>
feat(node-core): Expand <code>@opentelemetry/instrumentation</code>
range to cover `0.20...</li>
<li><a
href="962d6973cc"><code>962d697</code></a>
fix(core): Add missing <code>SentryDebugLogger</code> type export (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17046">#17046</a>)</li>
<li><a
href="779c15995c"><code>779c159</code></a>
chore(test-registry): Add more descriptive error code for common error
(<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/16790">#16790</a>)</li>
<li><a
href="6116610341"><code>6116610</code></a>
chore: Add external contributor to CHANGELOG.md (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17052">#17052</a>)</li>
<li><a
href="14c5d444cc"><code>14c5d44</code></a>
test(react): Pin react-router version for e2e test (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17051">#17051</a>)</li>
<li><a
href="163798656a"><code>1637986</code></a>
docs(bun): remove advice concerning unhandled exceptions (<a
href="https://redirect.github.com/getsentry/sentry-javascript/issues/17049">#17049</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/getsentry/sentry-javascript/compare/9.34.0...9.40.0">compare
view</a></li>
</ul>
</details>
<br />
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Bumps [zbus](https://github.com/dbus2/zbus) from 5.8.0 to 5.9.0.
<details>
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<p><em>Sourced from <a
href="https://github.com/dbus2/zbus/releases">zbus's
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<blockquote>
<h2>🔖 zbus 5.9.0</h2>
<ul>
<li>🧵 Remove deadlocks in Connection name request tasks, resulting in
leaks under certain
circumstances.</li>
<li>🐛 When registering names, allow name replacement by default.</li>
<li>✨ Allow setting request name flags in
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<li>✨ Proper Default impl for <code>RequestNameFlags</code>. This change
is theoretically an API break for
users who assumed the default value to be empty.</li>
<li>🧑💻 Add <code>fdo::StartServiceReply</code> type. In 6.0 this will be
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<li><a
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🔖 zb,zm: Release 5.9.0</li>
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📝 CONTRIBUTING: Link to gimoji's web interface</li>
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Merge pull request <a
href="https://redirect.github.com/dbus2/zbus/issues/1431">#1431</a> from
zeenix/name-request-defaults</li>
<li><a
href="ba2a40752d"><code>ba2a407</code></a>
🧵 zb: Remove deadlocks in Connection name request tasks</li>
<li><a
href="3d35496021"><code>3d35496</code></a>
🐛 zb: Allow name replacement by default</li>
<li><a
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📝 zb: Remove a bunch of unnecessary links</li>
<li><a
href="493a9943d6"><code>493a994</code></a>
Merge pull request <a
href="https://redirect.github.com/dbus2/zbus/issues/1429">#1429</a> from
valpackett/val/knrmmkqzrvyp</li>
<li><a
href="f2fb16fd18"><code>f2fb16f</code></a>
🧑💻 zb: add fdo::dbus::StartServiceReply type</li>
<li><a
href="f93584de1f"><code>f93584d</code></a>
⬆️ micro: Update winnow to v0.7.12 (<a
href="https://redirect.github.com/dbus2/zbus/issues/1428">#1428</a>)</li>
<li>Additional commits viewable in <a
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Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.140 to
1.0.141.
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use unreachable_unchecked for escape table. use a second match to
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replace start index with bytes slice reference</li>
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When being presented an invalid peer certificate, there is no reason why
we should retry the connection, it is unlikely to fix itself. Plus, the
certificate may get / be cached and a restart of the application is
necessary.
Resolves: #9944
This was exposed by #9846. It is being added here as a dedicated PR
because the compatibility tests would fail or at least be flaky for the
latest client release so we cannot add the integration test right away.
When receiving an `init` message from the portal, we will now revoke all
authorizations not listed in the `authorizations` list of the `init`
message.
We (partly) test this by introducing a new transition in our proptests
that de-authorizes a certain resource whilst the Gateway is simulated to
be partitioned. It is difficult to test that we cannot make a connection
once that has happened because we would have to simulate a malicious
client that knows about resources / connections or ignores the "remove
resource" message.
Testing this is deferred to a dedicated task. We do test that we hit the
code path of revoking the resource authorization and because the other
resources keep working, we also test that we are at least not revoking
the wrong ones.
Resolves: #9892
From Sentry reports and user-submitted logs, we know that it is possible
for Client and Gateway to de-sync in regards to what each other's public
key is. In such a scenario, ICE will succeed to make a connection but
`boringtun` will fail to handshake a tunnel. By default, `boringtun`
tries for 90s to handshake a session before it gives up and expires it.
In Firezone, the ICE agent takes care of establishing connectivity
whereas `boringtun` itself just encrypts and decrypts packets. As such,
if ICE is working, we know that packets aren't getting lost but instead,
there must be some other issue as to why we cannot establish a session.
To improve the UX in these error cases, we reduce the rekey-attempt-time
to 15s. This roughly matches our ICE timeout. Those 15s count from the
moment we send the first handshake which is just after ICE completes.
Thus we can be sure that after at most 15s, we either have a working
WireGuard session or the connection gets cleaned up.
Related: #9890
Related: #9850
In Docker environments, applying iptables rules to filter
container-container traffic on the Docker bridged network is not
reliable, leading to direct connections being established in our relayed
tests. To fix this, we insert the rules directly from the client
container itself.
---------
Co-authored-by: Jamil Bou Kheir <jamilbk@users.noreply.github.com>
When we invalidate or discard an allocation, it may happen that a relay
still sends channel-data messages to us. We don't recognize those and
will therefore attempt to parse them as WireGuard packets, ultimately
ending in an "Packet has unknown format" error.
To avoid this, we check if the packet is a valid channel-data message
even if we presently don't have an allocation on the relay that is
sending us the packet. In those cases, we can stop processing the
packet, thus avoiding these errors from being logged.
When a connection is in idle-mode, it only sends a STUN request every 25
seconds. If the Client disconnects e.g. due to a network partition, it
may send a new connection intent later. If the Gateway's connection is
still around then because it was in idle mode, it won't send any
candidates to the remote, making the Client's connection fail with "no
candidates received".
To alleviate this, we wake a connection out of idle mode every time it
is being upserted. This ensures that the connection will fail within 15s
IF the above scenario happens, allowing the Client to reconnect within a
much shorter time-frame.
Note that attempting to repair such a connection is likely pointless. It
is much safer to discard it and let them both establish a new
connection.
Related: #9862
Whilst looking through the auth module of the relay, I noticed that we
unnecessarily convert back and forth between expiry timestamps and
username formats when we could just be using the already parsed version.
Applying a filter globally to the entire subscriber means it filters
events for all layers. This prevents the Sentry layer from uploading
DEBUG logs if configured.
Bumps [rustls](https://github.com/rustls/rustls) from 0.23.28 to
0.23.29.
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Propagate context for webpki signature algorithm errors</li>
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key_schedule: minimise lifetime of resumption secret</li>
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key_schedule: add state for derivations before finish</li>
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tls13::key_schedule: move <code>KeySchedule</code> struct down</li>
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tls13::key_schedule: move <code>SecretKind</code> down</li>
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Correct calculation of ServerHello ECH confirmation</li>
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Bumps [zbus](https://github.com/dbus2/zbus) from 5.7.1 to 5.8.0.
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As per the WireGuard paper, `boringtun` tries to handshake with the
remote peer for 90s before it gives up. This timeout is important
because when a session is discarded due to e.g. missing replies,
WireGuard attempts to handshake a new session. Without this timeout, we
would then try to handshake a session forever.
Unfortunately, `boringtun` does not distinguish a missing handshake
response from a bad one. Decryption errors whilst decoding a handshake
response are simply passed up to the upper layer, in our case `snownet`.
I am not sure how we can actually fail to decrypt a handshake but the
pattern we are seeing in customer logs is that this happens over and
over again, so there is no point in having `boringtun` retry the
handshake. Therefore, we immediately fail the connection when this
happens.
Failed connections are immediately removed, triggering the client send a
new connection-intent to the portal. Such a new connection intent will
then sync-up the state between Client and Gateway so both of them use
the most recent public key.
Resolves: #9845
As a first step in preparation for sending OTEL metrics from Clients and
Gateways to a cloud-hosted OTEL collector, we extend the CLI of the
Gateway with configuration options to provide a gRPC endpoint to an OTEL
collector.
If `FIREZONE_METRICS` is set to `otel-collector` and an endpoint is
configured via `OTLP_GRPC_ENDPOINT`, we will report our metrics to that
collector.
The future plan for extending this is such that if `FIREZONE_METRICS` is
set to `otel-collector` (which will likely be the default) and no
`OTLP_GRPC_ENDPOINT` is set, then we will use our own, hosted OTEL
collector and report metrics IF the `export-metrics` feature-flag is set
to `true`.
This is a similar integration as we have done it with streaming logs to
Sentry. We can therefore enable it on a similar granularity as we do
with the logs and e.g. only enable it for the `firezone` account to
start with.
In meantime, customers can already make use of those metrics if they'd
like by using the current integration.
Resolves: #1550
Related: #7419
---------
Co-authored-by: Antoine Labarussias <antoinelabarussias@gmail.com>
When failing to create the TUN device, the error messages are currently
pretty bare. Add a bit more context so users can self-diagnose easier
what is wrong.
In the DNS resource NAT table, we track parts of the layer 4 protocol of
the connection in order to map packets back to the correct proxy IP in
case multiple DNS names resolve to the same real IP. The involvement of
layer 4 means we need to perform some packet inspection in case we
receive ICMP errors from an upstream router.
Presently, the only ICMP error we handle here is destination
unreachable. Those are generated e.g. when we are trying to contact an
IPv6 address but we don't have an IPv6 egress interface. An additional
error that we want to handle here is "time exceeded":
Time exceeded is sent when the TTL of a packet reaches 0. Typically,
TTLs are set high enough such that the packet makes it to its
destination. When using tools such as `tracepath` however, the TTL is
specifically only incremented one-by-one in order to resolve the exact
hops a packet is taking to a destination. Without handling the time
exceeded ICMP error, using `tracepath` through Firezone is broken
because the packets get dropped at the DNS resource NAT.
With this PR, we generalise the functionality of detecting destination
unreachable ICMP errors to also handle time-exceeded errors, allowing
tools such as `tracepath` to somewhat work:
```
❯ sudo docker compose exec --env RUST_LOG=info -it client /bin/sh -c 'tracepath -b example.com'
1?: [LOCALHOST] pmtu 1280
1: 100.82.110.64 (100.82.110.64) 0.795ms
1: 100.82.110.64 (100.82.110.64) 0.593ms
2: example.com (100.96.0.1) 0.696ms asymm 45
3: example.com (100.96.0.1) 5.788ms asymm 45
4: example.com (100.96.0.1) 7.787ms asymm 45
5: example.com (100.96.0.1) 8.412ms asymm 45
6: example.com (100.96.0.1) 9.545ms asymm 45
7: example.com (100.96.0.1) 7.312ms asymm 45
8: example.com (100.96.0.1) 8.779ms asymm 45
9: example.com (100.96.0.1) 9.455ms asymm 45
10: example.com (100.96.0.1) 14.410ms asymm 45
11: example.com (100.96.0.1) 24.244ms asymm 45
12: example.com (100.96.0.1) 31.286ms asymm 45
13: no reply
14: example.com (100.96.0.1) 303.860ms asymm 45
15: no reply
16: example.com (100.96.0.1) 135.616ms (This broken router returned corrupted payload) asymm 45
17: no reply
18: example.com (100.96.0.1) 161.647ms asymm 45
19: no reply
20: no reply
21: no reply
22: example.com (100.96.0.1) 238.066ms reached
Resume: pmtu 1280 hops 22 back 45
```
We say "somewhat work" because due to the NAT that is in place for DNS
resources, the output does not disclose the intermediary hops beyond the
Gateway.
Co-authored-by: Antoine Labarussias <antoinelabarussias@gmail.com>
---------
Co-authored-by: Antoine Labarussias <antoinelabarussias@gmail.com>
The latest version of str0m includes a fix that would result in an
immediate ICE timeout if a remote candidate was added prior to a local
candidate. We mitigated this in #9793 to make Firezone overall more
resilient towards sudden changes in the ICE connection state.
As a defense-in-depth measure, we also fixed this issue in str0m by not
transitioning to `Disconnected` if haven't even formed an candidate
pairs yet.
Diff:
2153bf0385...3d6e3d2f27
I am no longer able to compile `jemalloc` on my system in a debug build.
It fails with the following error:
```
src/malloc_io.c: In function ‘buferror’:
src/malloc_io.c:107:16: error: returning ‘char *’ from a function with return type ‘int’ makes integer from pointer without a cast [-Wint-conversion]
107 | return strerror_r(err, buf, buflen);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
This appears to be a problem with modern versions of clang/gcc. I
believe this started happening when I recently upgraded my system. The
upstream [`jemalloc`](https://github.com/jemalloc/jemalloc) repository
is now archived and thus unmaintained. I am not sure if we ever measured
a significant benefit in using `jemalloc`.
Related: https://github.com/servo/servo/issues/31059
Rust 1.88 has been released and brings with it a quite exciting feature:
let-chains! It allows us to mix-and-match `if` and `let` expressions,
therefore often reducing the "right-drift" of the relevant code, making
it easier to read.
Rust.188 also comes with a new clippy lint that warns when creating a
mutable reference from an immutable pointer. Attempting to fix this
revealed that this is exactly what we are doing in the eBPF kernel.
Unfortunately, it doesn't seem to be possible to design this in a way
that is both accepted by the borrow-checker AND by the eBPF verifier.
Hence, we simply make the function `unsafe` and document for the
programmer, what needs to be upheld.
With this patch, we sample a list of DNS resources on each test run and
create a "TCP service" for each of their addresses. Using this list of
resources, we then change the `SendTcpPayload` transition to
`ConnectTcp` and establish TCP connections using `smoltcp` to these
services.
For now, we don't send any data on these connections but we do set the
keep-alive interval to 5s, meaning `smoltcp` itself will keep these
connections alive. We also set the timeout to 30s and after each
transition in a test-run, we assert that all TCP sockets are still in
their expected state:
- `ESTABLISHED` for most of them.
- `CLOSED` for all sockets where we ended up sampling an IPv4 address
but the DNS resource only supports IPv6 addresses (or vice-versa). In
these cases, we use the ICMP error to sent by the Gateway to assert that
the socket is `CLOSED`. Unfortunately, `smoltcp` currently does not
handle ICMP messages for its sockets, so we have to call `abort`
ourselves.
Overall, this should assert that regardless of whether we roam networks,
switch relays or do other kind of stuff with the underlying connection,
the tunneled TCP connection stays alive.
In order to make this work, I had to tweak the timeouts when we are
on-demand refreshing allocations. This only happens in one particular
case: When we are being given new relays by the portal, we refresh all
_other_ relays to make sure they are still present. In other words, all
relays that we didn't remove and didn't just add but still had in-memory
are refreshed. This is important for cases where we are
network-partitioned from the portal whilst relays are deployed or reset
their state otherwise. Instead of the previous 8s max elapsed time of
the exponential backoff like we have it for other requests, we now only
use a single message with a 1s timeout there. With the increased ICE
timeout of 15s, a TCP connection with a 30s timeout would otherwise not
survive such an event. This is because it takes the above mentioned 8s
for us to remove a non-functioning relay, all whilst trying to establish
a new connection (which also incurs its own ICE timeout then).
With the reduced timeout on the on-demand refresh of 1s, we detect the
disappeared relay much quicker and can immediately establish a new
connection via one of the new ones. As always with reduced timeouts,
this can create false-positives if the relay doesn't reply within 1s for
some reason.
Resolves: #9531
When defining a resource, a Firezone admin can define traffic filters to
only allow traffic on certain TCP and/or UDP ports and/or restrict
traffic on the ICMP protocol.
Presently, when a packet is filtered out on the Gateway, we simply drop
it. Dropping packets means the sending application can only react to
timeouts and has no other means on error handling. ICMP was conceived to
deal with these kind of situations. In particular, the "destination
unreachable" type has a dedicated code for filtered packets:
"Communication administratively prohibited".
Instead of just dropping the not-allowed packet, we now send back an
ICMP error with this particular code set, thus informing the sending
application that the packet did not get lost but was in fact not routed
for policy reasons.
When setting a traffic filter that does not allow TCP traffic,
attempting to `curl` such a resource now results in the following:
```
❯ sudo docker compose exec --env RUST_LOG=info -it client /bin/sh -c 'curl -v example.com'
* Host example.com:80 was resolved.
* IPv6: fd00:2021:1111:8000::, fd00:2021:1111:8000::1, fd00:2021:1111:8000::2, fd00:2021:1111:8000::3
* IPv4: 100.96.0.1, 100.96.0.2, 100.96.0.3, 100.96.0.4
* Trying [fd00:2021:1111:8000::]:80...
* connect to fd00:2021:1111:8000:: port 80 from fd00:2021:1111::1e:7658 port 34560 failed: Permission denied
* Trying [fd00:2021:1111:8000::1]:80...
* connect to fd00:2021:1111:8000::1 port 80 from fd00:2021:1111::1e:7658 port 34828 failed: Permission denied
* Trying [fd00:2021:1111:8000::2]:80...
* connect to fd00:2021:1111:8000::2 port 80 from fd00:2021:1111::1e:7658 port 44314 failed: Permission denied
* Trying [fd00:2021:1111:8000::3]:80...
* connect to fd00:2021:1111:8000::3 port 80 from fd00:2021:1111::1e:7658 port 37628 failed: Permission denied
* Trying 100.96.0.1:80...
* connect to 100.96.0.1 port 80 from 100.66.110.26 port 53780 failed: Host is unreachable
* Trying 100.96.0.2:80...
* connect to 100.96.0.2 port 80 from 100.66.110.26 port 60748 failed: Host is unreachable
* Trying 100.96.0.3:80...
* connect to 100.96.0.3 port 80 from 100.66.110.26 port 38378 failed: Host is unreachable
* Trying 100.96.0.4:80...
* connect to 100.96.0.4 port 80 from 100.66.110.26 port 49866 failed: Host is unreachable
* Failed to connect to example.com port 80 after 9 ms: Could not connect to server
* closing connection #0
curl: (7) Failed to connect to example.com port 80 after 9 ms: Could not connect to server
```
In order to better track, how well our `ENOBUFS` mitigation is working,
we should log the use of our feature flag to PostHog. This will give us
some stats how often this is happening. That combined with the lack of
error reports should give us good confidence in permanently enabling
this behaviour.
When a packet gets filtered because we are unable to evaluate the source
protocol (i.e. TCP/UDP/ICMP), then the current error message currently
misleadingly says that the packet got filtered because the protocol is
not supported.
The truth however is that we were never able to apply the filter in the
first place. This is a subtle difference that is quite important when
debugging filtered packets. To improve this, we add an error message to
the stack here.
Firezone uses ICMP errors to signal to client applications that e.g. a
certain IP is not reachable. This happens for example if a DNS resource
only resolves to IPv4 addresses yet the client application attempted to
use an IPv6 proxy address to connect to it.
In the presence of traffic filters for such a resource that does _not_
allow ICMP, we currently filter out these ICMP errors because - well -
ICMP traffic is not allowed! However, even in the presence of ICMP
traffic being allowed, we would fail to evaluate this filter because the
ICMP error packet is not an ICMP echo reply and therefore doesn't have
an ICMP identifier. We require this in the DNS resource NAT to identify
"connections" and NAT them correctly. The same L4 component is used to
evaluate the traffic filters.
ICMP errors are critical to many usage scenarios and algorithms like
happy-eyeballs. Dropping them usually results in weird behaviour as
client applications can then only react to timeouts.