char *ipv4_address = sstrdup(get_ip_addr(interface, AF_INET));
char *ipv6_address = sstrdup(get_ip_addr(interface, AF_INET6));
char *ipv4_address = sstrdup(get_ip_addr(interface, AF_INET));
char *ipv6_address = sstrdup(get_ip_addr(interface, AF_INET6));