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#!/usr/bin/env python
import getdns
from struct import pack, unpack
def main():
CLIENT_SUBNET_OPCODE = 8
address = '192.168.1.0'
host = 'getdnsapi.net'
source_len = 12
family = pack("!H", 1) # start building the edns option fields
source_len = pack('!B', source_len)
scope_len = pack('!B', 0)
#
# encoding the binary data in strings makes it really easy
# to build packets by concatenating those strings
#
address = pack('!BBBB', 192, 168, 1, 0)
payload = family + source_len + scope_len + address
ext = { 'add_opt_parameters': {'options':
[ {'option_code': CLIENT_SUBNET_OPCODE,
'option_data': payload} ] }}
c = getdns.Context()
c.resolution_type = getdns.RESOLUTION_STUB
response = c.address(host, extensions=ext)
# do things with response ...
print response
if __name__ == '__main__':
main()
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