def _query_decoder(rpc_dict):
"""
Decode the given KRPC dictionary into a valid Query
@see decode
@return krpc_types.Query
"""
q = Query()
q._from = basic_coder.decode_network_id(rpc_dict['a']['id'])
q.rpctype = rpctype = rpc_dict['q']
if rpctype == 'ping':
pass
elif rpctype == 'find_node':
q.target_id = basic_coder.decode_network_id(rpc_dict['a']['target'])
elif rpctype == 'get_peers':
q.target_id = basic_coder.decode_network_id(rpc_dict['a']['info_hash'])
elif rpctype == 'announce_peer':
q.target_id = basic_coder.decode_network_id(rpc_dict['a']['info_hash'])
# Try encoding the port (to ensure it is within range)
basic_coder.encode_port(rpc_dict['a']['port'])
q.port = rpc_dict['a']['port']
q.token = basic_coder.btol(rpc_dict['a']['token'])
else:
raise _ProtocolFormatError()
return q
def _query_decoder(rpc_dict):
"""
Decode the given KRPC dictionary into a valid Query
@see decode
@return krpc_types.Query
"""
q = Query()
q._from = basic_coder.decode_network_id(rpc_dict['a']['id'])
q.rpctype = rpctype = rpc_dict['q']
if rpctype == 'ping':
pass
elif rpctype == 'find_node':
q.target_id = basic_coder.decode_network_id(rpc_dict['a']['target'])
elif rpctype == 'get_peers':
q.target_id = basic_coder.decode_network_id(rpc_dict['a']['info_hash'])
elif rpctype == 'announce_peer':
q.target_id = basic_coder.decode_network_id(rpc_dict['a']['info_hash'])
# Try encoding the port (to ensure it is within range)
basic_coder.encode_port(rpc_dict['a']['port'])
q.port = rpc_dict['a']['port']
q.token = basic_coder.btol(rpc_dict['a']['token'])
else:
raise _ProtocolFormatError()
return q
def test_ltob_and_btol(self):
bijection = lambda num: btol(ltob(num))
self.assertEqual(0, bijection(0))
self.assertEqual(512, bijection(512))
self.assertEqual(1024, bijection(1024))
self.assertEqual(9120890186313616, bijection(9120890186313616))
self.assertEqual(2**150, bijection(2**150))
self.assertEqual(2**133, bijection(2**133))
def _decode(packet):
"""@see decode"""
# Decode the bencoded dict into a python dict
rpc_dict = bdecode(packet)
# Decode the message into one of Query/Response/Error (as found
# in message_types)
msgtype = rpc_dict["y"]
message_decoders = {'q': _query_decoder,
'r': _response_decoder,
'e': _error_decoder}
rpc = message_decoders[msgtype](rpc_dict)
# Attach the transaction id
rpc._transaction_id = basic_coder.btol(rpc_dict['t'])
return rpc
def _decode(packet):
"""@see decode"""
# Decode the bencoded dict into a python dict
rpc_dict = bdecode(packet)
# Decode the message into one of Query/Response/Error (as found
# in message_types)
msgtype = rpc_dict["y"]
message_decoders = {
'q': _query_decoder,
'r': _response_decoder,
'e': _error_decoder
}
rpc = message_decoders[msgtype](rpc_dict)
# Attach the transaction id
rpc._transaction_id = basic_coder.btol(rpc_dict['t'])
return rpc
def _get_hash(self, query, address, secret):
"""
Create the hash code for the given query/address/secret combination
"""
node_id = query._from
infohash = query.target_id
hash = self.hash_constructor()
# The hash code relies on the querying node's ID,
# the target infohash of the query, the address of
# the querier, and a secret that changes every
# constants._secret_timeout seconds
hash.update(basic_coder.encode_network_id(node_id))
hash.update(basic_coder.encode_network_id(infohash))
hash.update(basic_coder.encode_address(address))
hash.update(secret)
# Return the hash as a number rather than a string
numeric_hash_value = basic_coder.btol(hash.digest())
return numeric_hash_value
def _get_hash(self, query, address, secret):
"""
Create the hash code for the given query/address/secret combination
"""
node_id = query._from
infohash = query.target_id
hash = self.hash_constructor()
# The hash code relies on the querying node's ID,
# the target infohash of the query, the address of
# the querier, and a secret that changes every
# constants._secret_timeout seconds
hash.update(basic_coder.encode_network_id(node_id))
hash.update(basic_coder.encode_network_id(infohash))
hash.update(basic_coder.encode_address(address))
hash.update(secret)
# Return the hash as a number rather than a string
numeric_hash_value = basic_coder.btol(hash.digest())
return numeric_hash_value
def _response_decoder(rpc_dict):
"""
Decode the given KRPC dictionary into a valid Response
@see decode
@return krpc_types.Response
"""
r = Response()
# All responses have querier IDs
r._from = basic_coder.decode_network_id(rpc_dict['r']['id'])
# find_node always returns a list of nodes
# get_peers sometimes returns a list of nodes
if 'nodes' in rpc_dict['r']:
r.nodes = _decode_nodes(rpc_dict['r']['nodes'])
# get_peers always returns a list of peers
if 'values' in rpc_dict['r']:
r.peers = _decode_addresses(rpc_dict['r']['values'])
# get_peers returns a token
if 'token' in rpc_dict['r']:
r.token = basic_coder.btol(rpc_dict['r']['token'])
return r
def _response_decoder(rpc_dict):
"""
Decode the given KRPC dictionary into a valid Response
@see decode
@return krpc_types.Response
"""
r = Response()
# All responses have querier IDs
r._from = basic_coder.decode_network_id(rpc_dict['r']['id'])
# find_node always returns a list of nodes
# get_peers sometimes returns a list of nodes
if 'nodes' in rpc_dict['r']:
r.nodes = _decode_nodes(rpc_dict['r']['nodes'])
# get_peers always returns a list of peers
if 'values' in rpc_dict['r']:
r.peers = _decode_addresses(rpc_dict['r']['values'])
# get_peers returns a token
if 'token' in rpc_dict['r']:
r.token = basic_coder.btol(rpc_dict['r']['token'])
return r
def __hash__(self):
return basic_coder.btol(encode_node(self))
def __hash__(self):
return basic_coder.btol(encode_node(self))