NAMESERVER_PORT
u[nserv].sin.sin_port = htons(NAMESERVER_PORT);
u[nserv].sin6.sin6_port = htons(NAMESERVER_PORT);
snprintf(sbuf, sizeof(sbuf), "%u", NAMESERVER_PORT);
arr->addr.sin.sin_port = htons(NAMESERVER_PORT);
arr->addr.sin.sin_port = htons(NAMESERVER_PORT);