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

*** 201,219 ****
  #else
      return JNI_FALSE;
  #endif
  }
  
  JNIEXPORT jint JNICALL
  Java_sun_nio_ch_Net_socket0(JNIEnv *env, jclass cl, jboolean preferIPv6,
                              jboolean stream, jboolean reuse, jboolean ignored)
  {
      int fd;
      int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
      int domain = (ipv6_available() && preferIPv6) ? AF_INET6 : AF_INET;
  
!     fd = socket(domain, type, 0);
      if (fd < 0) {
          return handleSocketError(env, errno);
      }
  
      /*
--- 201,227 ----
  #else
      return JNI_FALSE;
  #endif
  }
  
+ static int socket0(int domain, int type, int protocol) {
+     if (domain == AF_INET) {
+         errno = EAFNOSUPPORT;
+         return -1;
+     }
+     return socket(domain, type, protocol);
+ }
+ 
  JNIEXPORT jint JNICALL
  Java_sun_nio_ch_Net_socket0(JNIEnv *env, jclass cl, jboolean preferIPv6,
                              jboolean stream, jboolean reuse, jboolean ignored)
  {
      int fd;
      int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
      int domain = (ipv6_available() && preferIPv6) ? AF_INET6 : AF_INET;
  
!     fd = socket0(domain, type, 0);
      if (fd < 0) {
          return handleSocketError(env, errno);
      }
  
      /*