From f96ed20aa0a78dc500a763acda892f757f5e0e3c Mon Sep 17 00:00:00 2001
From: Ian Gulliver <github@flamingcow.io>
Date: Tue, 7 Apr 2026 22:22:19 +0900
Subject: [PATCH] Fix broadcast collection: UDP reader blocks until deadline,
 500ms timeout everywhere

---
 lib/client/udp.go | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/lib/client/udp.go b/lib/client/udp.go
index 348a2ee..9985bc4 100644
--- a/lib/client/udp.go
+++ b/lib/client/udp.go
@@ -118,17 +118,20 @@ func (t *udpTransport) SetReadTimeout(timeout time.Duration) {
 }
 
 func (t *udpTransport) Reader() io.Reader {
-	for {
-		if t.buf.Len() > 0 {
-			return &t.buf
-		}
-		pkt := make([]byte, 1500)
-		n, err := t.conn.Read(pkt)
-		if err != nil {
-			return &t.buf
-		}
-		t.buf.Write(pkt[:n])
+	return t
+}
+
+func (t *udpTransport) Read(p []byte) (int, error) {
+	if t.buf.Len() > 0 {
+		return t.buf.Read(p)
 	}
+	pkt := make([]byte, 1500)
+	n, err := t.conn.Read(pkt)
+	if err != nil {
+		return 0, err
+	}
+	t.buf.Write(pkt[:n])
+	return t.buf.Read(p)
 }
 
 func (t *udpTransport) Broadcast() bool { return t.broadcast }