int check_name_give_sockaddr(const char *hostname, struct sockaddr *addr,
char **errstr);
in_port_t find_port_for_service(char *service, char *proto);
int check_name_give_sockaddr(const char *hostname, struct sockaddr *addr,
char **errstr);
in_port_t find_port_for_service(char *service, char *proto);