fix: use timeout-loop sniff for Windows/Npcap compatibility

L2pcapListenSocket on Windows does not support 'stopper' kwarg. Replace with timeout=1.0 polling loop that respects stop_event.
2026-07-13 16:53:15 +08:00
parent ea8eb2b5f9
commit 552d51df77
1 changed files with 14 additions and 7 deletions
@@ -88,14 +88,21 @@ class DHCPd:
        bpf = "udp port 67 or udp port 68"
        log.info("Starting packet sniff on %s (BPF: %s)",
                 self.iface or "<default>", bpf)
+        # Use timeout loop: L2pcapListenSocket (Windows/Npcap) does NOT
+        # support the 'stopper' kwarg, so poll with short timeout instead.
        try:
-            sniff(
+            while not self._stop_event.is_set():
+                packets = sniff(
                    iface=self.iface,
                    filter=bpf,
-                prn=self._handle_packet,
-                stopper=lambda: self._stop_event.is_set(),
+                    count=100,       # cap per batch
+                    timeout=1.0,     # poll every ~1s
                    store=False,
                )
+                for pkt in packets:
+                    if self._stop_event.is_set():
+                        break
+                    self._handle_packet(pkt)
        except Exception as e:
            log.error("Sniffer died: %s", e)
        log.info("Sniffer thread exited.")