// Converts service name (as listed in /etc/services) to port number. Returns 0 on error.
extern uint16_t service_to_port(const char *service);
-extern struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) ATTR_MALLOC;
+extern struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) ATTR_DEALLOCATOR(freeaddrinfo);
extern sockaddr_t str2sockaddr(const char *address, const char *port);
extern void sockaddr2str(const sockaddr_t *sa, char **address, char **port);
extern char *sockaddr2hostname(const sockaddr_t *sa) ATTR_MALLOC;