diff --git a/network_bsd.cpp b/network_bsd.cpp
index 01f03ca..64c1cd1 100644
--- a/network_bsd.cpp
+++ b/network_bsd.cpp
@@ -286,6 +286,12 @@ void BaseSocketBsd::AddToEndLoop() {
     network_->endloop_[endloop_slot_ = network_->num_endloop_++] = this;
 }
 
+int BaseSocketBsd::StealFd() {
+  int fd = exch(fd_, -1);
+  CloseSocket();
+  return fd;
+}
+
 //////////////////////////////////////////////////////////////////////////////////////////////
 
 TunSocketBsd::TunSocketBsd(NetworkBsd *network, WireguardProcessor *processor)
diff --git a/network_bsd.h b/network_bsd.h
index 6f2c711..04a023b 100644
--- a/network_bsd.h
+++ b/network_bsd.h
@@ -101,6 +101,7 @@ public:
   void AddToEndLoop();
 
   int GetFd() { return fd_; }
+  int StealFd();
 
 protected:
   void SetPollFlags(int events) {