> GAI/GNI do not return TTL values, but this should not be a problem. > If they were to return anything, it should not be a TTL, but a time() > value, after which the result may no longer be used. > > One way to achieve that would be for GAI to return an opaque structure > that contained the IP and such a value, in a manner consumable by the > sockets API, and adjust connect() to return an error if passed a > structure containing a ' returned time + TTL' in the past.
AF_INET_TTL and AFINET6_TTL, with correspondingly expanded struct sockaddr_* ? Code that explictly requests AF_INET or AF_INET6 would get what it was expecting, code that requests AF_UNSPEC on a system with modified getaddrinfo() would get the expanded structs with the different ai_family set, and could pass them straight into a modified connect(). I'm sure I'm grossly oversimplifying somewhere though... Regards, Tim.
