step 5: (next semester)
1: actually populate the condor_hostent and ipaddr classes with ipv6 data. watch what breaks, come up with a plan. ipverify() and many other places in condor which assume 4-byte ip address or 21-byte address strings will need to be updated.
+
+{subsubsection: Complications}
+
+There's tricky thing on Phase 1. We decided not to remove struct hostent which is also obsolete. FYI,
+struct hostent is returned by gethostbyname() and is used for DNS lookup.
+
+The newer API for gethostbyname() is getnameinfo(). Indeed, getnameinfo() does not return struct
+hostent. Thus, I wrote a wrapper function that returns struct hostent using getnameinfo().
+
+The problem is that getnameinfo() does not return exact same information as gethostbyname() returns.
+Although getnameinfo() is replacement for gethostbyname(), they behave differently! Alternate
+hostname (hostname alias) could be different. I will send you the code that shows different behavior
+of gehostbyname() and getnameinfo().
+
+I am not sure if it would break the compatibility. We may need to discuss how we can treat semantic
+difference of gethostbyname() and getnameinfo().
