def _gethostbyaddr(self, ip_address_bytes):
try:
return resolver._gethostbyaddr(ip_address_bytes)
except gaierror as ex:
if ex.args[0] == EAI_NONAME:
# Note: The system doesn't *always* raise herror;
# sometimes the original gaierror propagates through.
# It's impossible to say ahead of time or just based
# on the name which it should be. The herror seems to
# be by far the most common, though.
raise herror(1, "Unknown host")
raise
def _gethostbyname_ex(self, hostname_bytes, family):
while True:
ares = self.cares
try:
waiter = Waiter(self.hub)
ares.gethostbyname(waiter, hostname_bytes, family)
result = waiter.get()
if not result[-1]:
raise herror(EAI_NONAME, self.EAI_NONAME_MSG)
return result
except herror as ex:
if ares is self.cares:
if ex.args[0] == 1:
# Somewhere along the line, the internal
# implementation of gethostbyname_ex changed to invoke
# getaddrinfo() as a first pass, much like we do for ``getnameinfo()``;
# this means it raises a different error for not-found hosts.
raise gaierror(EAI_NONAME, self.EAI_NONAME_MSG)
raise