def _edns_check(self, opt_record):
"""
Checks request EDNS record for compliance with EDNS0.
:param opt_record: OPT Record to check.
:return: Whether the request is valid and a corresponding OPT RR.
"""
flags = "do" if opt_record.edns_do else ""
if opt_record.edns_ver != 0:
opt = dnslib.EDNS0(
version=0,
ext_rcode=1,
flags=flags,
udp_len=opt_record.edns_len,
)
return False, opt
return True, dnslib.EDNS0(version=0,
ext_rcode=0,
flags=flags,
udp_len=opt_record.edns_len)
qtype = qtypes.pop()
query_data = get_wire()
else:
break
if ok:
mark_good_doh(server)
if not qtypes:
break
else:
mark_bad_doh(server)
if xips:
iplist.xip = xips
return iplist
remote_query_opt = dnslib.EDNS0(flags='do', udp_len=1024) # 1232
bv4_remote = 1 << 0
bv6_remote = 1 << 1
bv4_local = 1 << 2
bv6_local = 1 << 3
allresolved = (1 << 4) - 1
polluted_hosts = set()
def check_edns_opt(ar):
if len(ar) > 1:
return True
for r in ar:
return r.rtype is OPT and r.edns_do