refactor(client): remove redundant timestamp parameter from poll_timeouts

Use internal monotonic time by default and introduce poll_timeouts_at for callers requiring a specific sampled Instant. This simplifies the API for standard usage while maintaining flexibility for external event loops.

crates/irtt-client/src/client.rs

@@ -341,7 +341,19 @@ impl Client {
         recv_buffer_size(self.config.hmac_key.is_some(), self.negotiated.as_ref())
     }
 
-    pub fn poll_timeouts(&mut self, now: ClientTimestamp) -> Result<Vec<ClientEvent>, ClientError> {
+    /// Polls for probes that have timed out as of the current monotonic time.
+    pub fn poll_timeouts(&mut self) -> Result<Vec<ClientEvent>, ClientError> {
+        self.poll_timeouts_at(Instant::now())
+    }
+
+    /// Polls for probes that have timed out as of `now`.
+    ///
+    /// This is useful for callers that drive `Client` from their own event loop and
+    /// want timeout decisions to use the same sampled `Instant` as their scheduling
+    /// logic.
+    ///
+    /// `now` is monotonic time only; wall-clock time is not used for timeout expiry.
+    pub fn poll_timeouts_at(&mut self, now: Instant) -> Result<Vec<ClientEvent>, ClientError> {
         match self.phase {
             ClientPhase::Open { .. } => {}
             ClientPhase::Closed => return Err(ClientError::AlreadyClosed),
@@ -354,7 +366,7 @@ impl Client {
             .as_mut()
             .expect("session must exist when phase is Open");
 
-        let expired = session.pending.drain_expired(now.mono);
+        let expired = session.pending.drain_expired(now);
         let mut events = Vec::with_capacity(expired.len());
         for probe in expired {
             events.push(ClientEvent::EchoLoss {

crates/irtt-client/src/client/tests/close.rs

@@ -85,7 +85,7 @@ fn close_clears_timed_out_metadata() {
 
     client.send_probe().unwrap();
     thread::sleep(Duration::from_millis(60));
-    client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    client.poll_timeouts().unwrap();
     assert_eq!(client.session.as_ref().unwrap().timed_out.len(), 1);
 
     client.close().unwrap();

crates/irtt-client/src/client/tests/probes_replies.rs

@@ -896,11 +896,11 @@ fn poll_timeouts_emits_echo_loss() {
     client.send_probe().unwrap();
     client.send_probe().unwrap();
 
-    let no_loss = client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    let no_loss = client.poll_timeouts().unwrap();
     assert!(no_loss.is_empty());
 
     thread::sleep(Duration::from_millis(150));
-    let events = client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    let events = client.poll_timeouts().unwrap();
     assert_eq!(events.len(), 2);
     for event in &events {
         assert!(matches!(event, ClientEvent::EchoLoss { .. }));
@@ -925,7 +925,7 @@ fn poll_timeouts_removes_expired_pending() {
 
     client.send_probe().unwrap();
     thread::sleep(Duration::from_millis(150));
-    client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    client.poll_timeouts().unwrap();
 
     let session = client.session.as_ref().unwrap();
     assert_eq!(session.pending.len(), 0);
@@ -971,7 +971,7 @@ fn late_reply_after_timeout_preserves_measurement_metadata() {
 
     client.send_probe().unwrap();
     thread::sleep(Duration::from_millis(60));
-    let losses = client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    let losses = client.poll_timeouts().unwrap();
     assert!(matches!(&losses[0], ClientEvent::EchoLoss { seq: 0, .. }));
     assert_eq!(client.session.as_ref().unwrap().pending.len(), 0);
     assert_eq!(client.session.as_ref().unwrap().timed_out.len(), 1);
@@ -1050,7 +1050,7 @@ fn late_reply_metadata_is_unavailable_without_ancillary() {
 
     client.send_probe().unwrap();
     thread::sleep(Duration::from_millis(60));
-    let losses = client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    let losses = client.poll_timeouts().unwrap();
     assert!(matches!(&losses[0], ClientEvent::EchoLoss { seq: 0, .. }));
 
     let late = client.recv_once().unwrap();
@@ -1099,7 +1099,7 @@ fn late_reply_metadata_propagates_observed_dscp_with_ancillary() {
 
     client.send_probe().unwrap();
     thread::sleep(Duration::from_millis(60));
-    let losses = client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    let losses = client.poll_timeouts().unwrap();
     assert!(matches!(&losses[0], ClientEvent::EchoLoss { seq: 0, .. }));
 
     let events = client.recv_once().unwrap();
@@ -1617,7 +1617,7 @@ fn process_received_packet_uses_supplied_receive_metadata_for_late_reply() {
 
     client.send_probe_at(ClientTimestamp::now()).unwrap();
     thread::sleep(Duration::from_millis(60));
-    let losses = client.poll_timeouts(ClientTimestamp::now()).unwrap();
+    let losses = client.poll_timeouts().unwrap();
     assert!(matches!(&losses[0], ClientEvent::EchoLoss { seq: 0, .. }));
 
     let recv_ts = ClientTimestamp::now();

crates/irtt-client/src/managed/runner.rs

@@ -7,7 +7,6 @@ use crate::{
     config::{ClientConfig, RecvBudget},
     error::ClientError,
     event::{ClientEvent, OpenOutcome},
-    timing::ClientTimestamp,
     Client,
 };
 
@@ -182,11 +181,7 @@ fn run_client(
                 &mut counters,
                 client.recv_available(MANAGED_RECV_BUDGET)?,
             );
-            publish_events(
-                &hub,
-                &mut counters,
-                client.poll_timeouts(ClientTimestamp::now())?,
-            );
+            publish_events(&hub, &mut counters, client.poll_timeouts()?);
             break;
         }
 
@@ -205,11 +200,7 @@ fn run_client(
             &mut counters,
             client.recv_available(MANAGED_RECV_BUDGET)?,
         );
-        publish_events(
-            &hub,
-            &mut counters,
-            client.poll_timeouts(ClientTimestamp::now())?,
-        );
+        publish_events(&hub, &mut counters, client.poll_timeouts()?);
 
         if client.is_run_complete() {
             break;
@@ -267,7 +258,7 @@ fn drain_final_late_replies(
         published |= !events.is_empty();
         publish_events(hub, counters, events);
 
-        let events = client.poll_timeouts(ClientTimestamp::now())?;
+        let events = client.poll_timeouts()?;
         published |= !events.is_empty();
         publish_events(hub, counters, events);
 

crates/irtt-client/tests/hmac.rs

@@ -3,7 +3,7 @@ mod support;
 use std::time::Duration;
 
 use irtt_client::{
-    Client, ClientConfig, ClientError, ClientEvent, ClientTimestamp, OpenOutcome, SocketConfig,
+    Client, ClientConfig, ClientError, ClientEvent, OpenOutcome, SocketConfig,
     WarningKind,
 };
 use irtt_proto::{echo_packet_len, ProtoError, TimestampFields};

crates/irtt-client/tests/large_packets.rs

@@ -1,6 +1,6 @@
 mod support;
 
-use irtt_client::{Client, ClientConfig, ClientEvent, ClientTimestamp, NegotiationPolicy};
+use irtt_client::{Client, ClientConfig, ClientEvent, NegotiationPolicy};
 use irtt_proto::{echo_header_len, echo_packet_len, Params, TimestampFields};
 
 use support::{config_for_params, default_params, run_one_probe, BackendPeer, ServerObservation};

crates/irtt-client/tests/protocol_options.rs

@@ -1,6 +1,5 @@
 mod support;
 
-use irtt_client::ClientTimestamp;
 use std::time::Duration;
 
 use irtt_client::{

crates/irtt-client/tests/server_fill.rs

@@ -1,7 +1,7 @@
 mod support;
 
 use irtt_client::{
-    Client, ClientConfig, ClientError, ClientEvent, ClientTimestamp, NegotiationPolicy,
+    Client, ClientConfig, ClientError, ClientEvent, NegotiationPolicy,
 };
 use irtt_proto::{echo_packet_len, Params, TimestampFields};
 

crates/irtt-client/tests/support/mod.rs

@@ -11,7 +11,7 @@ use std::{
 };
 
 use irtt_client::{
-    Client, ClientConfig, ClientEvent, ClientTimestamp, NegotiatedParams, OpenOutcome, SocketConfig,
+    Client, ClientConfig, ClientEvent, NegotiatedParams, OpenOutcome, SocketConfig,
 };
 use irtt_proto::{
     compute_hmac_in_place, echo_packet_len, flags, verify_hmac, Clock, Params, ProtoError,