warnings.simplefilter("ignore", DeprecationWarning)
from datetime import datetime, timedelta
-from random import randrange
+from random import randrange, shuffle
from sha import sha
import os
from ktable import KTable
from knode import KNodeBase, KNodeRead, KNodeWrite, NULL_ID
from khash import newID, newIDInRange
-from actions import FindNode, GetValue, KeyExpirer, StoreValue
+from actions import FindNode, FindValue, GetValue, StoreValue
import krpc
# this is the base class, has base functionality and find node, no key-value mappings
self.store = DB(os.path.join(cache_dir, 'khashmir.' + str(self.port) + '.db'))
self.node = self._loadSelfNode('', self.port)
self.table = KTable(self.node, config)
+ self.token_secrets = [newID()]
#self.app = service.Application("krpc")
- self.udp = krpc.hostbroker(self)
+ self.udp = krpc.hostbroker(self, config)
self.udp.protocol = krpc.KRPC
self.listenport = reactor.listenUDP(self.port, self.udp)
self._loadRoutingTable()
- self.expirer = KeyExpirer(self.store, config)
self.refreshTable(force=1)
self.next_checkpoint = reactor.callLater(60, self.checkpoint, (1,))
- def Node(self):
- n = self._Node()
+ def Node(self, id, host = None, port = None):
+ """Create a new node."""
+ n = self._Node(id, host, port)
n.table = self.table
+ n.conn = self.udp.connectionForAddr((n.host, n.port))
return n
def __del__(self):
id = self.store.getSelfNode()
if not id:
id = newID()
- return self._Node().init(id, host, port)
+ return self._Node(id, host, port)
def checkpoint(self, auto=0):
+ self.token_secrets.insert(0, newID())
+ if len(self.token_secrets) > 3:
+ self.token_secrets.pop()
self.store.saveSelfNode(self.node.id)
self.store.dumpRoutingTable(self.table.buckets)
+ self.store.expireValues(self.config['KEY_EXPIRE'])
self.refreshTable()
if auto:
self.next_checkpoint = reactor.callLater(randrange(int(self.config['CHECKPOINT_INTERVAL'] * .9),
"""
nodes = self.store.getRoutingTable()
for rec in nodes:
- n = self.Node().initWithDict({'id':rec[0], 'host':rec[1], 'port':int(rec[2])})
- n.conn = self.udp.connectionForAddr((n.host, n.port))
+ n = self.Node(rec[0], rec[1], int(rec[2]))
self.table.insertNode(n, contacted=0)
#######
####### LOCAL INTERFACE - use these methods!
- def addContact(self, host, port, callback=None):
+ def addContact(self, host, port, callback=None, errback=None):
"""
ping this node and add the contact info to the table on pong!
"""
- n =self.Node().init(NULL_ID, host, port)
- n.conn = self.udp.connectionForAddr((n.host, n.port))
- self.sendPing(n, callback=callback)
+ n = self.Node(NULL_ID, host, port)
+ self.sendJoin(n, callback=callback, errback=errback)
## this call is async!
def findNode(self, id, callback, errback=None):
df = old.ping(self.node.id)
df.addCallbacks(_notStaleNodeHandler, _staleNodeHandler)
- def sendPing(self, node, callback=None):
+ def sendJoin(self, node, callback=None, errback=None):
"""
ping a node
"""
- df = node.ping(self.node.id)
+ df = node.join(self.node.id)
## these are the callbacks we use when we issue a PING
- def _pongHandler(dict, node=node, table=self.table, callback=callback):
- _krpc_sender = dict['_krpc_sender']
- dict = dict['rsp']
- sender = {'id' : dict['id']}
- sender['host'] = _krpc_sender[0]
- sender['port'] = _krpc_sender[1]
- n = self.Node().initWithDict(sender)
- n.conn = self.udp.connectionForAddr((n.host, n.port))
- table.insertNode(n)
+ def _pongHandler(dict, node=node, self=self, callback=callback):
+ n = self.Node(dict['rsp']['id'], dict['_krpc_sender'][0], dict['_krpc_sender'][1])
+ self.insertNode(n)
if callback:
- callback()
- def _defaultPong(err, node=node, table=self.table, callback=callback):
+ callback((dict['rsp']['ip_addr'], dict['rsp']['port']))
+ def _defaultPong(err, node=node, table=self.table, callback=callback, errback=errback):
table.nodeFailed(node)
- if callback:
- callback()
+ if errback:
+ errback()
+ else:
+ callback(None)
df.addCallbacks(_pongHandler,_defaultPong)
- def findCloseNodes(self, callback=lambda a: None):
+ def findCloseNodes(self, callback=lambda a: None, errback = None):
"""
This does a findNode on the ID one away from our own.
This will allow us to populate our table with nodes on our network closest to our own.
This is called as soon as we start up with an empty table
"""
id = self.node.id[:-1] + chr((ord(self.node.id[-1]) + 1) % 256)
- self.findNode(id, callback)
+ self.findNode(id, callback, errback)
def refreshTable(self, force=0):
"""
self.next_checkpoint.cancel()
except:
pass
- self.expirer.shutdown()
self.store.close()
+ #### Remote Interface - called by remote nodes
def krpc_ping(self, id, _krpc_sender):
- sender = {'id' : id}
- sender['host'] = _krpc_sender[0]
- sender['port'] = _krpc_sender[1]
- n = self.Node().initWithDict(sender)
- n.conn = self.udp.connectionForAddr((n.host, n.port))
+ n = self.Node(id, _krpc_sender[0], _krpc_sender[1])
self.insertNode(n, contacted=0)
return {"id" : self.node.id}
+ def krpc_join(self, id, _krpc_sender):
+ n = self.Node(id, _krpc_sender[0], _krpc_sender[1])
+ self.insertNode(n, contacted=0)
+ return {"ip_addr" : _krpc_sender[0], "port" : _krpc_sender[1], "id" : self.node.id}
+
def krpc_find_node(self, target, id, _krpc_sender):
- nodes = self.table.findNodes(target)
- nodes = map(lambda node: node.senderDict(), nodes)
- sender = {'id' : id}
- sender['host'] = _krpc_sender[0]
- sender['port'] = _krpc_sender[1]
- n = self.Node().initWithDict(sender)
- n.conn = self.udp.connectionForAddr((n.host, n.port))
+ n = self.Node(id, _krpc_sender[0], _krpc_sender[1])
self.insertNode(n, contacted=0)
- return {"nodes" : nodes, "id" : self.node.id}
+ nodes = self.table.findNodes(target)
+ nodes = map(lambda node: node.contactInfo(), nodes)
+ token = sha(self.token_secrets[0] + _krpc_sender[0]).digest()
+ return {"nodes" : nodes, "token" : token, "id" : self.node.id}
## This class provides read-only access to the DHT, valueForKey
_Node = KNodeRead
## also async
+ def findValue(self, key, callback, errback=None):
+ """ returns the contact info for nodes that have values for the key, from the global table """
+ # get K nodes out of local table/cache
+ nodes = self.table.findNodes(key)
+ d = Deferred()
+ if errback:
+ d.addCallbacks(callback, errback)
+ else:
+ d.addCallback(callback)
+
+ # create our search state
+ state = FindValue(self, key, d.callback, self.config)
+ reactor.callLater(0, state.goWithNodes, nodes)
+
def valueForKey(self, key, callback, searchlocal = 1):
""" returns the values found for key in global table
callback will be called with a list of values for each peer that returns unique values
final callback will be an empty list - probably should change to 'more coming' arg
"""
- nodes = self.table.findNodes(key)
-
# get locals
if searchlocal:
l = self.store.retrieveValues(key)
reactor.callLater(0, callback, key, l)
else:
l = []
-
- # create our search state
- state = GetValue(self, key, callback, self.config)
- reactor.callLater(0, state.goWithNodes, nodes, l)
+ def _getValueForKey(nodes, key=key, local_values=l, response=callback, table=self.table, config=self.config):
+ # create our search state
+ state = GetValue(table, key, 50 - len(local_values), response, config)
+ reactor.callLater(0, state.goWithNodes, nodes, local_values)
+
+ # this call is asynch
+ self.findValue(key, _getValueForKey)
+
+ #### Remote Interface - called by remote nodes
def krpc_find_value(self, key, id, _krpc_sender):
- sender = {'id' : id}
- sender['host'] = _krpc_sender[0]
- sender['port'] = _krpc_sender[1]
- n = self.Node().initWithDict(sender)
- n.conn = self.udp.connectionForAddr((n.host, n.port))
+ n = self.Node(id, _krpc_sender[0], _krpc_sender[1])
+ self.insertNode(n, contacted=0)
+
+ nodes = self.table.findNodes(key)
+ nodes = map(lambda node: node.contactInfo(), nodes)
+ num_values = self.store.countValues(key)
+ return {'nodes' : nodes, 'num' : num_values, "id": self.node.id}
+
+ def krpc_get_value(self, key, num, id, _krpc_sender):
+ n = self.Node(id, _krpc_sender[0], _krpc_sender[1])
self.insertNode(n, contacted=0)
l = self.store.retrieveValues(key)
- if len(l) > 0:
+ if num == 0 or num >= len(l):
return {'values' : l, "id": self.node.id}
else:
- nodes = self.table.findNodes(key)
- nodes = map(lambda node: node.senderDict(), nodes)
- return {'nodes' : nodes, "id": self.node.id}
+ shuffle(l)
+ return {'values' : l[:num], "id": self.node.id}
### provides a generic write method, you probably don't want to deploy something that allows
### arbitrary value storage
_Node = KNodeWrite
## async, callback indicates nodes we got a response from (but no guarantee they didn't drop it on the floor)
def storeValueForKey(self, key, value, callback=None):
- """ stores the value for key in the global table, returns immediately, no status
+ """ stores the value and origination time for key in the global table, returns immediately, no status
in this implementation, peers respond but don't indicate status to storing values
a key can have many values
"""
- def _storeValueForKey(nodes, key=key, value=value, response=callback , table=self.table):
+ def _storeValueForKey(nodes, key=key, value=value, response=callback, table=self.table, config=self.config):
if not response:
# default callback
def _storedValueHandler(key, value, sender):
pass
response=_storedValueHandler
- action = StoreValue(self.table, key, value, response, self.config)
+ action = StoreValue(table, key, value, response, config)
reactor.callLater(0, action.goWithNodes, nodes)
# this call is asynch
self.findNode(key, _storeValueForKey)
- def krpc_store_value(self, key, value, id, _krpc_sender):
- self.store.storeValue(key, value)
- sender = {'id' : id}
- sender['host'] = _krpc_sender[0]
- sender['port'] = _krpc_sender[1]
- n = self.Node().initWithDict(sender)
- n.conn = self.udp.connectionForAddr((n.host, n.port))
+ #### Remote Interface - called by remote nodes
+ def krpc_store_value(self, key, value, token, id, _krpc_sender):
+ n = self.Node(id, _krpc_sender[0], _krpc_sender[1])
self.insertNode(n, contacted=0)
- return {"id" : self.node.id}
+ for secret in self.token_secrets:
+ this_token = sha(secret + _krpc_sender[0]).digest()
+ if token == this_token:
+ self.store.storeValue(key, value)
+ return {"id" : self.node.id}
+ raise krpc.KrpcError, (krpc.KRPC_ERROR_INVALID_TOKEN, 'token is invalid, do a find_nodes to get a fresh one')
# the whole shebang, for testing
class Khashmir(KhashmirWrite):
timeout = 10
DHT_DEFAULTS = {'PORT': 9977, 'K': 8, 'HASH_LENGTH': 160,
- 'CHECKPOINT_INTERVAL': 900, 'CONCURRENT_REQS': 4,
+ 'CHECKPOINT_INTERVAL': 300, 'CONCURRENT_REQS': 4,
'STORE_REDUNDANCY': 3, 'MAX_FAILURES': 3,
'MIN_PING_INTERVAL': 900,'BUCKET_STALENESS': 3600,
- 'KEINITIAL_DELAY': 15, 'KE_DELAY': 1200,
- 'KE_AGE': 3600, }
+ 'KEY_EXPIRE': 3600, 'SPEW': False, }
def setUp(self):
krpc.KRPC.noisy = 0
os.unlink(self.b.store.db)
def testAddContact(self):
- self.assertEqual(len(self.a.table.buckets), 1)
- self.assertEqual(len(self.a.table.buckets[0].l), 0)
+ self.failUnlessEqual(len(self.a.table.buckets), 1)
+ self.failUnlessEqual(len(self.a.table.buckets[0].l), 0)
- self.assertEqual(len(self.b.table.buckets), 1)
- self.assertEqual(len(self.b.table.buckets[0].l), 0)
+ self.failUnlessEqual(len(self.b.table.buckets), 1)
+ self.failUnlessEqual(len(self.b.table.buckets[0].l), 0)
self.a.addContact('127.0.0.1', 4045)
reactor.iterate()
reactor.iterate()
reactor.iterate()
- self.assertEqual(len(self.a.table.buckets), 1)
- self.assertEqual(len(self.a.table.buckets[0].l), 1)
- self.assertEqual(len(self.b.table.buckets), 1)
- self.assertEqual(len(self.b.table.buckets[0].l), 1)
+ self.failUnlessEqual(len(self.a.table.buckets), 1)
+ self.failUnlessEqual(len(self.a.table.buckets[0].l), 1)
+ self.failUnlessEqual(len(self.b.table.buckets), 1)
+ self.failUnlessEqual(len(self.b.table.buckets[0].l), 1)
def testStoreRetrieve(self):
self.a.addContact('127.0.0.1', 4045)
def _cb(self, key, val):
if not val:
- self.assertEqual(self.got, 1)
+ self.failUnlessEqual(self.got, 1)
elif 'foobar' in val:
self.got = 1
timeout = 30
num = 20
DHT_DEFAULTS = {'PORT': 9977, 'K': 8, 'HASH_LENGTH': 160,
- 'CHECKPOINT_INTERVAL': 900, 'CONCURRENT_REQS': 4,
+ 'CHECKPOINT_INTERVAL': 300, 'CONCURRENT_REQS': 4,
'STORE_REDUNDANCY': 3, 'MAX_FAILURES': 3,
'MIN_PING_INTERVAL': 900,'BUCKET_STALENESS': 3600,
- 'KEINITIAL_DELAY': 15, 'KE_DELAY': 1200,
- 'KE_AGE': 3600, }
+ 'KEY_EXPIRE': 3600, 'SPEW': False, }
def _done(self, val):
self.done = 1
def _rcb(key, val):
if not val:
self.done = 1
- self.assertEqual(self.got, 1)
+ self.failUnlessEqual(self.got, 1)
elif V in val:
self.got = 1
for x in range(3):
projects / quix0rs-apt-p2p.git / blobdiff