if (addr->ss_family == AF_INET6) {
sockaddr_in6* saddr = reinterpret_cast<sockaddr_in6*>(addr);
saddr->sin6_addr = ip.ipv6_address();
if (addr->ss_family == AF_INET6) {
sockaddr_in6* saddr = reinterpret_cast<sockaddr_in6*>(addr);
saddr->sin6_addr = ip.ipv6_address();