char *addr, ssize_t addrlen, int32_t *netmask);
char *parse_url(const char *url,
char *host, ssize_t hostlen, int32_t *port);
-char *format_url(const char *url, int default_port);
+__malloc char *format_url(const char *url, int default_port);
const char *stringify_port(int port, const char *transport);
int lookup_address(unsigned l4type, bool passive, const char *host,