2 void locate_host(char *tbuf
, size_t n
,
4 const struct in_addr
*addr
);
5 int rbl_check(char *message_to_spammer
);
6 int hostname_to_dotted_quad(char *addr
, char *host
);
7 int rblcheck_backend(char *domain
, char *txtbuf
, int txtbufsize
);