src/java.base/unix/native/libnio/ch/Net.c

*** 273,292 ****
      return fd;
  }
  
  JNIEXPORT void JNICALL
  Java_sun_nio_ch_Net_bind0(JNIEnv *env, jclass clazz, jobject fdo, jboolean preferIPv6,
!                           jboolean useExclBind, jobject iao, int port)
  {
      SOCKETADDRESS sa;
      int sa_len = 0;
      int rv = 0;
  
      if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len,
                                    preferIPv6) != 0) {
          return;
      }
  
      rv = NET_Bind(fdval(env, fdo), &sa, sa_len);
      if (rv != 0) {
          handleSocketError(env, errno);
      }
--- 273,295 ----
      return fd;
  }
  
  JNIEXPORT void JNICALL
  Java_sun_nio_ch_Net_bind0(JNIEnv *env, jclass clazz, jobject fdo, jboolean preferIPv6,
!                           jboolean useExclBind, jobject iao, int port, int scopeId)
  {
      SOCKETADDRESS sa;
      int sa_len = 0;
      int rv = 0;
  
      if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len,
                                    preferIPv6) != 0) {
          return;
      }
+     if (scopeId != -1) { // use the explicit scopeId, if there is one
+         ((struct sockaddr_in6 *)&sa.sa)->sin6_scope_id = scopeId;
+     }
  
      rv = NET_Bind(fdval(env, fdo), &sa, sa_len);
      if (rv != 0) {
          handleSocketError(env, errno);
      }