socklen_t *_RESTRICT _address_len) );
_PROTOTYPE( int setsockopt,(int _socket, int _level, int _option_name,
const void *_option_value, socklen_t _option_len) );
+_PROTOTYPE( int getsockopt, (int _socket, int _level, int _option_name,
+ void *_RESTRICT _option_value, socklen_t *_RESTRICT _option_len));
_PROTOTYPE( int listen, (int _socket, int _backlog) );
_PROTOTYPE( ssize_t recvfrom, (int _socket, void *_RESTRICT _buffer,
size_t _length, int _flags, struct sockaddr *_RESTRICT _address,