deal with up-to-date

diff --git a/dns/query.py b/dns/query.py
index fa79ad8ea15ceb1cced84444bb21555f1f8f715f..66bf946f63e67eefdb003780ffa05e25f70281fe 100644 (file)
--- a/dns/query.py
+++ b/dns/query.py
@@ -327,6 +327,8 @@ def xfr(where, zone, rdtype=dns.rdatatype.AXFR, rdclass=dns.rdataclass.IN,
             if rrset.rdtype != dns.rdatatype.SOA:
                 raise dns.exception.FormError
             soa_rrset = rrset.copy()
+            if soa_rrset.serial == serial:
+                done = True
         #
         # Count the number of origin SOA RRs in this message
         #