diff --git a/RELICENSE/yunye-pu.md b/RELICENSE/yunye-pu.md
new file mode 100644
index 00000000..774131ce
--- /dev/null
+++ b/RELICENSE/yunye-pu.md
@@ -0,0 +1,15 @@
+# Permission to Relicense under MPLv2 or any other share-alike OSI approved license chosen by the current ZeroMQ BDFL
+
+This is a statement by Yunye Pu
+that grants permission to relicense its copyrights in the libzmq C++
+library (ZeroMQ) under the Mozilla Public License v2 (MPLv2) or any other
+share-alike Open Source Initiative approved license chosen by the current
+ZeroMQ BDFL (Benevolent Dictator for Life).
+
+A portion of the commits made by the Github handle "Yunye-Pu", with
+commit author "Yunye Pu <yunye.pu.4743@gmail.com>", are copyright of Yunye Pu.
+This document hereby grants the libzmq project team to relicense libzmq,
+including all past, present and future contributions of the author listed above.
+
+Yunye Pu
+2021/08/31
\ No newline at end of file
diff --git a/src/wss_engine.cpp b/src/wss_engine.cpp
index 986a6a4f..fc729d2a 100644
--- a/src/wss_engine.cpp
+++ b/src/wss_engine.cpp
@@ -194,6 +194,11 @@ int zmq::wss_engine_t::read (void *data_, size_t size_)
         return -1;
     }
 
+	if (rc == 0) {
+        errno = EPIPE;
+        return -1;
+    }
+
     if (rc < 0) {
         errno = EINVAL;
         return -1;
@@ -207,14 +212,8 @@ int zmq::wss_engine_t::write (const void *data_, size_t size_)
 {
     ssize_t rc = gnutls_record_send (_tls_session, data_, size_);
 
-    if (rc == GNUTLS_E_INTERRUPTED) {
-        errno = EINTR;
-        return -1;
-    }
-
-    if (rc == GNUTLS_E_AGAIN) {
-        errno = EAGAIN;
-        return -1;
+    if (rc == GNUTLS_E_INTERRUPTED || rc == GNUTLS_E_AGAIN) {
+        return 0;
     }
 
     if (rc < 0) {