def zone_for_name(name, rdclass=rdataclass.IN, tcp=False, resolver=None):
"""Find the name of the zone which contains the specified name.
@param name: the query name
@type name: absolute name.Name object or string
@param rdclass: The query class
@type rdclass: int
@param tcp: use TCP to make the query (default is False).
@type tcp: bool
@param resolver: the resolver to use
@type resolver: resolver.Resolver object or None
@rtype: name.Name"""
if isinstance(name, (str, unicode)):
name = name.from_text(name, name.root)
if resolver is None:
resolver = get_default_resolver()
if not name.is_absolute():
raise NotAbsolute(name)
while 1:
try:
answer = resolver.query(name, rdatatype.SOA, rdclass, tcp)
if answer.rrset.name == name:
return name
# otherwise we were CNAMEd or DNAMEd and need to look higher
except (resolver.NXDOMAIN, resolver.NoAnswer):
pass
try:
name = name.parent()
except name.NoParent:
raise NoRootSOA
def _validate_name(self, name):
if isinstance(name, (str, unicode)):
name = name.from_text(name, None)
elif not isinstance(name, name.Name):
raise KeyError("name parameter must be convertable to a DNS name")
if name.is_absolute():
if not name.is_subdomain(self.origin):
raise KeyError("name parameter must be a subdomain of the zone origin")
if self.relativize:
name = name.relativize(self.origin)
return name
def _validate_name(self, name):
if isinstance(name, (str, unicode)):
name = name.from_text(name, None)
elif not isinstance(name, name.Name):
raise KeyError("name parameter must be convertable to a DNS name")
if name.is_absolute():
if not name.is_subdomain(self.origin):
raise KeyError(
"name parameter must be a subdomain of the zone origin")
if self.relativize:
name = name.relativize(self.origin)
return name
