chore(android): start telemetry together with connlib session (#7151)

As a first step for integration Sentry into the Android app, we launch
the Sentry Rust agent as soon as a `connlib` session starts up. At a
later point, we can also integrate Sentry into the Android app itself
using the Java / Kotlin SDK.

---------

Signed-off-by: Thomas Eizinger <thomas@eizinger.io>

rust/Cargo.lock

@@ -1053,6 +1053,7 @@ dependencies = [
  "connlib-client-shared",
  "connlib-model",
  "firezone-logging",
+ "firezone-telemetry",
  "ip_network",
  "jni",
  "libc",

rust/connlib/clients/android/Cargo.toml

@@ -14,6 +14,7 @@ backoff = "0.4.0"
 connlib-client-shared = { workspace = true }
 connlib-model = { workspace = true }
 firezone-logging = { workspace = true }
+firezone-telemetry = { workspace = true }
 ip_network = "0.4"
 jni = { version = "0.21.1", features = ["invocation"] }
 libc = "0.2"

rust/connlib/clients/android/src/lib.rs

@@ -7,6 +7,7 @@ use crate::tun::Tun;
 use backoff::ExponentialBackoffBuilder;
 use connlib_client_shared::{Callbacks, DisconnectError, Session, V4RouteList, V6RouteList};
 use connlib_model::{ResourceId, ResourceView};
+use firezone_telemetry::{Telemetry, ANDROID_DSN};
 use ip_network::{Ipv4Network, Ipv6Network};
 use jni::{
     objects::{GlobalRef, JClass, JObject, JString, JValue},
@@ -344,9 +345,11 @@ fn connect(
     let log_dir = string_from_jstring!(env, log_dir);
     let log_filter = string_from_jstring!(env, log_filter);
     let device_info = string_from_jstring!(env, device_info);
-
     let device_info = serde_json::from_str(&device_info).unwrap();
 
+    let telemetry = Telemetry::default();
+    telemetry.start(&api_url, env!("CARGO_PKG_VERSION"), ANDROID_DSN);
+
     let handle = init_logging(&PathBuf::from(log_dir), log_filter);
     install_rustls_crypto_provider();
 
@@ -394,6 +397,7 @@ fn connect(
     Ok(SessionWrapper {
         inner: session,
         runtime,
+        telemetry,
     })
 }
 
@@ -451,6 +455,7 @@ pub struct SessionWrapper {
     inner: Session,
 
     runtime: Runtime,
+    telemetry: Telemetry,
 }
 
 /// # Safety
@@ -463,7 +468,10 @@ pub unsafe extern "system" fn Java_dev_firezone_android_tunnel_ConnlibSession_di
 ) {
     let session = session_ptr as *mut SessionWrapper;
     catch_and_throw(&mut env, |_| {
-        Box::from_raw(session).inner.disconnect();
+        let session = Box::from_raw(session);
+
+        session.inner.disconnect();
+        session.telemetry.stop();
     });
 }
 

rust/telemetry/src/lib.rs

@@ -20,6 +20,7 @@ pub const GATEWAY_DSN: Dsn = Dsn("https://f763102cc3937199ec483fbdae63dfdc@o4507
 pub const GUI_DSN: Dsn = Dsn("https://2e17bf5ed24a78c0ac9e84a5de2bd6fc@o4507971108339712.ingest.us.sentry.io/4508008945549312");
 pub const HEADLESS_DSN: Dsn = Dsn("https://bc27dca8bb37be0142c48c4f89647c13@o4507971108339712.ingest.us.sentry.io/4508010028728320");
 pub const IPC_SERVICE_DSN: Dsn = Dsn("https://0590b89fd4479494a1e7ffa4dc705001@o4507971108339712.ingest.us.sentry.io/4508008896069632");
+pub const ANDROID_DSN: Dsn = Dsn("https://928a6ee1f6af9734100b8bc89b2dc87d@o4507971108339712.ingest.us.sentry.io/4508175126233088");
 
 #[derive(Default)]
 pub struct Telemetry {

website/src/components/Changelog/Android.tsx

@@ -13,6 +13,9 @@ export default function Android() {
       {/* When you cut a release, remove any solved issues from the "known issues" lists over in `client-apps`. This must not be done when the issue's PR merges. */}
       <Unreleased>
         <ChangeItem>Handles DNS queries over TCP correctly.</ChangeItem>
+        <ChangeItem pull="7151">
+          Adds always-on error reporting using sentry.io.
+        </ChangeItem>
       </Unreleased>
       <Entry version="1.3.5" date={new Date("2024-10-03")}>
         <ChangeItem pull="6831">