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lbrycrd/qa/rpc-tests/mininode.py
Suhas Daftuar 6c1d1ba6fc Python p2p testing framework 
mininode.py provides a framework for connecting to a bitcoin node over the p2p
network. NodeConn is the main object that manages connectivity to a node and
provides callbacks; the interface for those callbacks is defined by NodeConnCB.
Defined also are all data structures from bitcoin core that pass on the network
(CBlock, CTransaction, etc), along with de-/serialization functions.

maxblocksinflight.py is an example test using this framework that tests whether
a node is limiting the maximum number of in-flight block requests.

This also adds support to util.py for specifying the binary to use when
starting nodes (for tests that compare the behavior of different bitcoind
versions), and adds maxblocksinflight.py to the pull tester.
2015-04-28 12:38:29 -04:00

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# mininode.py - Bitcoin P2P network half-a-node
#
# Distributed under the MIT/X11 software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# This python code was modified from ArtForz' public domain half-a-node, as
# found in the mini-node branch of http://github.com/jgarzik/pynode.
#
# NodeConn: an object which manages p2p connectivity to a bitcoin node
# NodeConnCB: a base class that describes the interface for receiving
# callbacks with network messages from a NodeConn
# CBlock, CTransaction, CBlockHeader, CTxIn, CTxOut, etc....:
# data structures that should map to corresponding structures in
# bitcoin/primitives
# msg_block, msg_tx, msg_headers, etc.:
# data structures that represent network messages
# ser_*, deser_*: functions that handle serialization/deserialization
import struct
import socket
import asyncore
import binascii
import time
import sys
import random
import cStringIO
import hashlib
from threading import Lock
from threading import Thread
import logging
import copy
BIP0031_VERSION = 60000
MY_VERSION = 60001 # past bip-31 for ping/pong
MY_SUBVERSION = "/python-mininode-tester:0.0.1/"
MAX_INV_SZ = 50000
# Serialization/deserialization tools
def sha256(s):
return hashlib.new('sha256', s).digest()
def hash256(s):
return sha256(sha256(s))
def deser_string(f):
nit = struct.unpack("<B", f.read(1))[0]
if nit == 253:
nit = struct.unpack("<H", f.read(2))[0]
elif nit == 254:
nit = struct.unpack("<I", f.read(4))[0]
elif nit == 255:
nit = struct.unpack("<Q", f.read(8))[0]
return f.read(nit)
def ser_string(s):
if len(s) < 253:
return chr(len(s)) + s
elif len(s) < 0x10000:
return chr(253) + struct.pack("<H", len(s)) + s
elif len(s) < 0x100000000L:
return chr(254) + struct.pack("<I", len(s)) + s
return chr(255) + struct.pack("<Q", len(s)) + s
def deser_uint256(f):
r = 0L
for i in xrange(8):
t = struct.unpack("<I", f.read(4))[0]
r += t << (i * 32)
return r
def ser_uint256(u):
rs = ""
for i in xrange(8):
rs += struct.pack("<I", u & 0xFFFFFFFFL)
u >>= 32
return rs
def uint256_from_str(s):
r = 0L
t = struct.unpack("<IIIIIIII", s[:32])
for i in xrange(8):
r += t[i] << (i * 32)
return r
def uint256_from_compact(c):
nbytes = (c >> 24) & 0xFF
v = (c & 0xFFFFFFL) << (8 * (nbytes - 3))
return v
def deser_vector(f, c):
nit = struct.unpack("<B", f.read(1))[0]
if nit == 253:
nit = struct.unpack("<H", f.read(2))[0]
elif nit == 254:
nit = struct.unpack("<I", f.read(4))[0]
elif nit == 255:
nit = struct.unpack("<Q", f.read(8))[0]
r = []
for i in xrange(nit):
t = c()
t.deserialize(f)
r.append(t)
return r
def ser_vector(l):
r = ""
if len(l) < 253:
r = chr(len(l))
elif len(l) < 0x10000:
r = chr(253) + struct.pack("<H", len(l))
elif len(l) < 0x100000000L:
r = chr(254) + struct.pack("<I", len(l))
else:
r = chr(255) + struct.pack("<Q", len(l))
for i in l:
r += i.serialize()
return r
def deser_uint256_vector(f):
nit = struct.unpack("<B", f.read(1))[0]
if nit == 253:
nit = struct.unpack("<H", f.read(2))[0]
elif nit == 254:
nit = struct.unpack("<I", f.read(4))[0]
elif nit == 255:
nit = struct.unpack("<Q", f.read(8))[0]
r = []
for i in xrange(nit):
t = deser_uint256(f)
r.append(t)
return r
def ser_uint256_vector(l):
r = ""
if len(l) < 253:
r = chr(len(l))
elif len(l) < 0x10000:
r = chr(253) + struct.pack("<H", len(l))
elif len(l) < 0x100000000L:
r = chr(254) + struct.pack("<I", len(l))
else:
r = chr(255) + struct.pack("<Q", len(l))
for i in l:
r += ser_uint256(i)
return r
def deser_string_vector(f):
nit = struct.unpack("<B", f.read(1))[0]
if nit == 253:
nit = struct.unpack("<H", f.read(2))[0]
elif nit == 254:
nit = struct.unpack("<I", f.read(4))[0]
elif nit == 255:
nit = struct.unpack("<Q", f.read(8))[0]
r = []
for i in xrange(nit):
t = deser_string(f)
r.append(t)
return r
def ser_string_vector(l):
r = ""
if len(l) < 253:
r = chr(len(l))
elif len(l) < 0x10000:
r = chr(253) + struct.pack("<H", len(l))
elif len(l) < 0x100000000L:
r = chr(254) + struct.pack("<I", len(l))
else:
r = chr(255) + struct.pack("<Q", len(l))
for sv in l:
r += ser_string(sv)
return r
def deser_int_vector(f):
nit = struct.unpack("<B", f.read(1))[0]
if nit == 253:
nit = struct.unpack("<H", f.read(2))[0]
elif nit == 254:
nit = struct.unpack("<I", f.read(4))[0]
elif nit == 255:
nit = struct.unpack("<Q", f.read(8))[0]
r = []
for i in xrange(nit):
t = struct.unpack("<i", f.read(4))[0]
r.append(t)
return r
def ser_int_vector(l):
r = ""
if len(l) < 253:
r = chr(len(l))
elif len(l) < 0x10000:
r = chr(253) + struct.pack("<H", len(l))
elif len(l) < 0x100000000L:
r = chr(254) + struct.pack("<I", len(l))
else:
r = chr(255) + struct.pack("<Q", len(l))
for i in l:
r += struct.pack("<i", i)
return r
# Objects that map to bitcoind objects, which can be serialized/deserialized
class CAddress(object):
def __init__(self):
self.nServices = 1
self.pchReserved = "\x00" * 10 + "\xff" * 2
self.ip = "0.0.0.0"
self.port = 0
def deserialize(self, f):
self.nServices = struct.unpack("<Q", f.read(8))[0]
self.pchReserved = f.read(12)
self.ip = socket.inet_ntoa(f.read(4))
self.port = struct.unpack(">H", f.read(2))[0]
def serialize(self):
r = ""
r += struct.pack("<Q", self.nServices)
r += self.pchReserved
r += socket.inet_aton(self.ip)
r += struct.pack(">H", self.port)
return r
def __repr__(self):
return "CAddress(nServices=%i ip=%s port=%i)" % (self.nServices,
self.ip, self.port)
class CInv(object):
typemap = {
0: "Error",
1: "TX",
2: "Block"}
def __init__(self, t=0, h=0L):
self.type = t
self.hash = h
def deserialize(self, f):
self.type = struct.unpack("<i", f.read(4))[0]
self.hash = deser_uint256(f)
def serialize(self):
r = ""
r += struct.pack("<i", self.type)
r += ser_uint256(self.hash)
return r
def __repr__(self):
return "CInv(type=%s hash=%064x)" \
% (self.typemap[self.type], self.hash)
class CBlockLocator(object):
def __init__(self):
self.nVersion = MY_VERSION
self.vHave = []
def deserialize(self, f):
self.nVersion = struct.unpack("<i", f.read(4))[0]
self.vHave = deser_uint256_vector(f)
def serialize(self):
r = ""
r += struct.pack("<i", self.nVersion)
r += ser_uint256_vector(self.vHave)
return r
def __repr__(self):
return "CBlockLocator(nVersion=%i vHave=%s)" \
% (self.nVersion, repr(self.vHave))
class COutPoint(object):
def __init__(self, hash=0, n=0):
self.hash = hash
self.n = n
def deserialize(self, f):
self.hash = deser_uint256(f)
self.n = struct.unpack("<I", f.read(4))[0]
def serialize(self):
r = ""
r += ser_uint256(self.hash)
r += struct.pack("<I", self.n)
return r
def __repr__(self):
return "COutPoint(hash=%064x n=%i)" % (self.hash, self.n)
class CTxIn(object):
def __init__(self, outpoint=None, scriptSig="", nSequence=0):
if outpoint is None:
self.prevout = COutPoint()
else:
self.prevout = outpoint
self.scriptSig = scriptSig
self.nSequence = nSequence
def deserialize(self, f):
self.prevout = COutPoint()
self.prevout.deserialize(f)
self.scriptSig = deser_string(f)
self.nSequence = struct.unpack("<I", f.read(4))[0]
def serialize(self):
r = ""
r += self.prevout.serialize()
r += ser_string(self.scriptSig)
r += struct.pack("<I", self.nSequence)
return r
def __repr__(self):
return "CTxIn(prevout=%s scriptSig=%s nSequence=%i)" \
% (repr(self.prevout), binascii.hexlify(self.scriptSig),
self.nSequence)
class CTxOut(object):
def __init__(self, nValue=0, scriptPubKey=""):
self.nValue = nValue
self.scriptPubKey = scriptPubKey
def deserialize(self, f):
self.nValue = struct.unpack("<q", f.read(8))[0]
self.scriptPubKey = deser_string(f)
def serialize(self):
r = ""
r += struct.pack("<q", self.nValue)
r += ser_string(self.scriptPubKey)
return r
def __repr__(self):
return "CTxOut(nValue=%i.%08i scriptPubKey=%s)" \
% (self.nValue // 100000000, self.nValue % 100000000,
binascii.hexlify(self.scriptPubKey))
class CTransaction(object):
def __init__(self, tx=None):
if tx is None:
self.nVersion = 1
self.vin = []
self.vout = []
self.nLockTime = 0
self.sha256 = None
self.hash = None
else:
self.nVersion = tx.nVersion
self.vin = copy.deepcopy(tx.vin)
self.vout = copy.deepcopy(tx.vout)
self.nLockTime = tx.nLockTime
self.sha256 = None
self.hash = None
def deserialize(self, f):
self.nVersion = struct.unpack("<i", f.read(4))[0]
self.vin = deser_vector(f, CTxIn)
self.vout = deser_vector(f, CTxOut)
self.nLockTime = struct.unpack("<I", f.read(4))[0]
self.sha256 = None
self.hash = None
def serialize(self):
r = ""
r += struct.pack("<i", self.nVersion)
r += ser_vector(self.vin)
r += ser_vector(self.vout)
r += struct.pack("<I", self.nLockTime)
return r
def rehash(self):
self.sha256 = None
self.calc_sha256()
def calc_sha256(self):
if self.sha256 is None:
self.sha256 = uint256_from_str(hash256(self.serialize()))
self.hash = hash256(self.serialize())[::-1].encode('hex_codec')
def is_valid(self):
self.calc_sha256()
for tout in self.vout:
if tout.nValue < 0 or tout.nValue > 21000000L * 100000000L:
return False
return True
def __repr__(self):
return "CTransaction(nVersion=%i vin=%s vout=%s nLockTime=%i)" \
% (self.nVersion, repr(self.vin), repr(self.vout), self.nLockTime)
class CBlockHeader(object):
def __init__(self, header=None):
if header is None:
self.set_null()
else:
self.nVersion = header.nVersion
self.hashPrevBlock = header.hashPrevBlock
self.hashMerkleRoot = header.hashMerkleRoot
self.nTime = header.nTime
self.nBits = header.nBits
self.nNonce = header.nNonce
self.sha256 = header.sha256
self.hash = header.hash
self.calc_sha256()
def set_null(self):
self.nVersion = 1
self.hashPrevBlock = 0
self.hashMerkleRoot = 0
self.nTime = 0
self.nBits = 0
self.nNonce = 0
self.sha256 = None
self.hash = None
def deserialize(self, f):
self.nVersion = struct.unpack("<i", f.read(4))[0]
self.hashPrevBlock = deser_uint256(f)
self.hashMerkleRoot = deser_uint256(f)
self.nTime = struct.unpack("<I", f.read(4))[0]
self.nBits = struct.unpack("<I", f.read(4))[0]
self.nNonce = struct.unpack("<I", f.read(4))[0]
self.sha256 = None
self.hash = None
def serialize(self):
r = ""
r += struct.pack("<i", self.nVersion)
r += ser_uint256(self.hashPrevBlock)
r += ser_uint256(self.hashMerkleRoot)
r += struct.pack("<I", self.nTime)
r += struct.pack("<I", self.nBits)
r += struct.pack("<I", self.nNonce)
return r
def calc_sha256(self):
if self.sha256 is None:
r = ""
r += struct.pack("<i", self.nVersion)
r += ser_uint256(self.hashPrevBlock)
r += ser_uint256(self.hashMerkleRoot)
r += struct.pack("<I", self.nTime)
r += struct.pack("<I", self.nBits)
r += struct.pack("<I", self.nNonce)
self.sha256 = uint256_from_str(hash256(r))
self.hash = hash256(r)[::-1].encode('hex_codec')
def rehash(self):
self.sha256 = None
self.calc_sha256()
return self.sha256
def __repr__(self):
return "CBlockHeader(nVersion=%i hashPrevBlock=%064x hashMerkleRoot=%064x nTime=%s nBits=%08x nNonce=%08x)" \
% (self.nVersion, self.hashPrevBlock, self.hashMerkleRoot,
time.ctime(self.nTime), self.nBits, self.nNonce)
class CBlock(CBlockHeader):
def __init__(self, header=None):
super(CBlock, self).__init__(header)
self.vtx = []
def deserialize(self, f):
super(CBlock, self).deserialize(f)
self.vtx = deser_vector(f, CTransaction)
def serialize(self):
r = ""
r += super(CBlock, self).serialize()
r += ser_vector(self.vtx)
return r
def calc_merkle_root(self):
hashes = []
for tx in self.vtx:
tx.calc_sha256()
hashes.append(ser_uint256(tx.sha256))
while len(hashes) > 1:
newhashes = []
for i in xrange(0, len(hashes), 2):
i2 = min(i+1, len(hashes)-1)
newhashes.append(hash256(hashes[i] + hashes[i2]))
hashes = newhashes
return uint256_from_str(hashes[0])
def is_valid(self):
self.calc_sha256()
target = uint256_from_compact(self.nBits)
if self.sha256 > target:
return False
for tx in self.vtx:
if not tx.is_valid():
return False
if self.calc_merkle_root() != self.hashMerkleRoot:
return False
return True
def solve(self):
self.calc_sha256()
target = uint256_from_compact(self.nBits)
while self.sha256 > target:
self.nNonce += 1
self.rehash()
def __repr__(self):
return "CBlock(nVersion=%i hashPrevBlock=%064x hashMerkleRoot=%064x nTime=%s nBits=%08x nNonce=%08x vtx=%s)" \
% (self.nVersion, self.hashPrevBlock, self.hashMerkleRoot,
time.ctime(self.nTime), self.nBits, self.nNonce, repr(self.vtx))
class CUnsignedAlert(object):
def __init__(self):
self.nVersion = 1
self.nRelayUntil = 0
self.nExpiration = 0
self.nID = 0
self.nCancel = 0
self.setCancel = []
self.nMinVer = 0
self.nMaxVer = 0
self.setSubVer = []
self.nPriority = 0
self.strComment = ""
self.strStatusBar = ""
self.strReserved = ""
def deserialize(self, f):
self.nVersion = struct.unpack("<i", f.read(4))[0]
self.nRelayUntil = struct.unpack("<q", f.read(8))[0]
self.nExpiration = struct.unpack("<q", f.read(8))[0]
self.nID = struct.unpack("<i", f.read(4))[0]
self.nCancel = struct.unpack("<i", f.read(4))[0]
self.setCancel = deser_int_vector(f)
self.nMinVer = struct.unpack("<i", f.read(4))[0]
self.nMaxVer = struct.unpack("<i", f.read(4))[0]
self.setSubVer = deser_string_vector(f)
self.nPriority = struct.unpack("<i", f.read(4))[0]
self.strComment = deser_string(f)
self.strStatusBar = deser_string(f)
self.strReserved = deser_string(f)
def serialize(self):
r = ""
r += struct.pack("<i", self.nVersion)
r += struct.pack("<q", self.nRelayUntil)
r += struct.pack("<q", self.nExpiration)
r += struct.pack("<i", self.nID)
r += struct.pack("<i", self.nCancel)
r += ser_int_vector(self.setCancel)
r += struct.pack("<i", self.nMinVer)
r += struct.pack("<i", self.nMaxVer)
r += ser_string_vector(self.setSubVer)
r += struct.pack("<i", self.nPriority)
r += ser_string(self.strComment)
r += ser_string(self.strStatusBar)
r += ser_string(self.strReserved)
return r
def __repr__(self):
return "CUnsignedAlert(nVersion %d, nRelayUntil %d, nExpiration %d, nID %d, nCancel %d, nMinVer %d, nMaxVer %d, nPriority %d, strComment %s, strStatusBar %s, strReserved %s)" \
% (self.nVersion, self.nRelayUntil, self.nExpiration, self.nID,
self.nCancel, self.nMinVer, self.nMaxVer, self.nPriority,
self.strComment, self.strStatusBar, self.strReserved)
class CAlert(object):
def __init__(self):
self.vchMsg = ""
self.vchSig = ""
def deserialize(self, f):
self.vchMsg = deser_string(f)
self.vchSig = deser_string(f)
def serialize(self):
r = ""
r += ser_string(self.vchMsg)
r += ser_string(self.vchSig)
return r
def __repr__(self):
return "CAlert(vchMsg.sz %d, vchSig.sz %d)" \
% (len(self.vchMsg), len(self.vchSig))
# Objects that correspond to messages on the wire
class msg_version(object):
command = "version"
def __init__(self):
self.nVersion = MY_VERSION
self.nServices = 1
self.nTime = time.time()
self.addrTo = CAddress()
self.addrFrom = CAddress()
self.nNonce = random.getrandbits(64)
self.strSubVer = MY_SUBVERSION
self.nStartingHeight = -1
def deserialize(self, f):
self.nVersion = struct.unpack("<i", f.read(4))[0]
if self.nVersion == 10300:
self.nVersion = 300
self.nServices = struct.unpack("<Q", f.read(8))[0]
self.nTime = struct.unpack("<q", f.read(8))[0]
self.addrTo = CAddress()
self.addrTo.deserialize(f)
if self.nVersion >= 106:
self.addrFrom = CAddress()
self.addrFrom.deserialize(f)
self.nNonce = struct.unpack("<Q", f.read(8))[0]
self.strSubVer = deser_string(f)
if self.nVersion >= 209:
self.nStartingHeight = struct.unpack("<i", f.read(4))[0]
else:
self.nStartingHeight = None
else:
self.addrFrom = None
self.nNonce = None
self.strSubVer = None
self.nStartingHeight = None
def serialize(self):
r = ""
r += struct.pack("<i", self.nVersion)
r += struct.pack("<Q", self.nServices)
r += struct.pack("<q", self.nTime)
r += self.addrTo.serialize()
r += self.addrFrom.serialize()
r += struct.pack("<Q", self.nNonce)
r += ser_string(self.strSubVer)
r += struct.pack("<i", self.nStartingHeight)
return r
def __repr__(self):
return 'msg_version(nVersion=%i nServices=%i nTime=%s addrTo=%s addrFrom=%s nNonce=0x%016X strSubVer=%s nStartingHeight=%i)' \
% (self.nVersion, self.nServices, time.ctime(self.nTime),
repr(self.addrTo), repr(self.addrFrom), self.nNonce,
self.strSubVer, self.nStartingHeight)
class msg_verack(object):
command = "verack"
def __init__(self):
pass
def deserialize(self, f):
pass
def serialize(self):
return ""
def __repr__(self):
return "msg_verack()"
class msg_addr(object):
command = "addr"
def __init__(self):
self.addrs = []
def deserialize(self, f):
self.addrs = deser_vector(f, CAddress)
def serialize(self):
return ser_vector(self.addrs)
def __repr__(self):
return "msg_addr(addrs=%s)" % (repr(self.addrs))
class msg_alert(object):
command = "alert"
def __init__(self):
self.alert = CAlert()
def deserialize(self, f):
self.alert = CAlert()
self.alert.deserialize(f)
def serialize(self):
r = ""
r += self.alert.serialize()
return r
def __repr__(self):
return "msg_alert(alert=%s)" % (repr(self.alert), )
class msg_inv(object):
command = "inv"
def __init__(self, inv=None):
if inv is None:
self.inv = []
else:
self.inv = inv
def deserialize(self, f):
self.inv = deser_vector(f, CInv)
def serialize(self):
return ser_vector(self.inv)
def __repr__(self):
return "msg_inv(inv=%s)" % (repr(self.inv))
class msg_getdata(object):
command = "getdata"
def __init__(self):
self.inv = []
def deserialize(self, f):
self.inv = deser_vector(f, CInv)
def serialize(self):
return ser_vector(self.inv)
def __repr__(self):
return "msg_getdata(inv=%s)" % (repr(self.inv))
class msg_getblocks(object):
command = "getblocks"
def __init__(self):
self.locator = CBlockLocator()
self.hashstop = 0L
def deserialize(self, f):
self.locator = CBlockLocator()
self.locator.deserialize(f)
self.hashstop = deser_uint256(f)
def serialize(self):
r = ""
r += self.locator.serialize()
r += ser_uint256(self.hashstop)
return r
def __repr__(self):
return "msg_getblocks(locator=%s hashstop=%064x)" \
% (repr(self.locator), self.hashstop)
class msg_tx(object):
command = "tx"
def __init__(self, tx=CTransaction()):
self.tx = tx
def deserialize(self, f):
self.tx.deserialize(f)
def serialize(self):
return self.tx.serialize()
def __repr__(self):
return "msg_tx(tx=%s)" % (repr(self.tx))
class msg_block(object):
command = "block"
def __init__(self, block=None):
if block is None:
self.block = CBlock()
else:
self.block = block
def deserialize(self, f):
self.block.deserialize(f)
def serialize(self):
return self.block.serialize()
def __repr__(self):
return "msg_block(block=%s)" % (repr(self.block))
class msg_getaddr(object):
command = "getaddr"
def __init__(self):
pass
def deserialize(self, f):
pass
def serialize(self):
return ""
def __repr__(self):
return "msg_getaddr()"
class msg_ping_prebip31(object):
command = "ping"
def __init__(self):
pass
def deserialize(self, f):
pass
def serialize(self):
return ""
def __repr__(self):
return "msg_ping() (pre-bip31)"
class msg_ping(object):
command = "ping"
def __init__(self, nonce=0L):
self.nonce = nonce
def deserialize(self, f):
self.nonce = struct.unpack("<Q", f.read(8))[0]
def serialize(self):
r = ""
r += struct.pack("<Q", self.nonce)
return r
def __repr__(self):
return "msg_ping(nonce=%08x)" % self.nonce
class msg_pong(object):
command = "pong"
def __init__(self, nonce=0L):
self.nonce = nonce
def deserialize(self, f):
self.nonce = struct.unpack("<Q", f.read(8))[0]
def serialize(self):
r = ""
r += struct.pack("<Q", self.nonce)
return r
def __repr__(self):
return "msg_pong(nonce=%08x)" % self.nonce
class msg_mempool(object):
command = "mempool"
def __init__(self):
pass
def deserialize(self, f):
pass
def serialize(self):
return ""
def __repr__(self):
return "msg_mempool()"
# getheaders message has
# number of entries
# vector of hashes
# hash_stop (hash of last desired block header, 0 to get as many as possible)
class msg_getheaders(object):
command = "getheaders"
def __init__(self):
self.locator = CBlockLocator()
self.hashstop = 0L
def deserialize(self, f):
self.locator = CBlockLocator()
self.locator.deserialize(f)
self.hashstop = deser_uint256(f)
def serialize(self):
r = ""
r += self.locator.serialize()
r += ser_uint256(self.hashstop)
return r
def __repr__(self):
return "msg_getheaders(locator=%s, stop=%064x)" \
% (repr(self.locator), self.hashstop)
# headers message has
# <count> <vector of block headers>
class msg_headers(object):
command = "headers"
def __init__(self):
self.headers = []
def deserialize(self, f):
# comment in bitcoind indicates these should be deserialized as blocks
blocks = deser_vector(f, CBlock)
for x in blocks:
self.headers.append(CBlockHeader(x))
def serialize(self):
blocks = [CBlock(x) for x in self.headers]
return ser_vector(blocks)
def __repr__(self):
return "msg_headers(headers=%s)" % repr(self.headers)
class msg_reject(object):
command = "reject"
def __init__(self):
self.message = ""
self.code = ""
self.reason = ""
self.data = 0L
def deserialize(self, f):
self.message = deser_string(f)
self.code = struct.unpack("<B", f.read(1))[0]
self.reason = deser_string(f)
if (self.message == "block" or self.message == "tx"):
self.data = deser_uint256(f)
def serialize(self):
r = ser_string(self.message)
r += struct.pack("<B", self.code)
r += ser_string(self.reason)
if (self.message == "block" or self.message == "tx"):
r += ser_uint256(self.data)
return r
def __repr__(self):
return "msg_reject: %s %d %s [%064x]" \
% (self.message, self.code, self.reason, self.data)
# This is what a callback should look like for NodeConn
# Reimplement the on_* functions to provide handling for events
class NodeConnCB(object):
def __init__(self):
# Acquire on all callbacks -- overkill for now since asyncore is
# single-threaded, but may be useful for synchronizing access to
# member variables in derived classes.
self.cbLock = Lock()
self.verack_received = False
# Derived classes should call this function once to set the message map
# which associates the derived classes' functions to incoming messages
def create_callback_map(self):
self.cbmap = {
"version": self.on_version,
"verack": self.on_verack,
"addr": self.on_addr,
"alert": self.on_alert,
"inv": self.on_inv,
"getdata": self.on_getdata,
"getblocks": self.on_getblocks,
"tx": self.on_tx,
"block": self.on_block,
"getaddr": self.on_getaddr,
"ping": self.on_ping,
"pong": self.on_pong,
"headers": self.on_headers,
"getheaders": self.on_getheaders,
"reject": self.on_reject,
"mempool": self.on_mempool
}
def deliver(self, conn, message):
with self.cbLock:
try:
self.cbmap[message.command](conn, message)
except:
print "ERROR delivering %s (%s)" % (repr(message),
sys.exc_info()[0])
def on_version(self, conn, message):
if message.nVersion >= 209:
conn.send_message(msg_verack())
conn.ver_send = min(MY_VERSION, message.nVersion)
if message.nVersion < 209:
conn.ver_recv = conn.ver_send
def on_verack(self, conn, message):
conn.ver_recv = conn.ver_send
self.verack_received = True
def on_inv(self, conn, message):
want = msg_getdata()
for i in message.inv:
if i.type != 0:
want.inv.append(i)
if len(want.inv):
conn.send_message(want)
def on_addr(self, conn, message): pass
def on_alert(self, conn, message): pass
def on_getdata(self, conn, message): pass
def on_getblocks(self, conn, message): pass
def on_tx(self, conn, message): pass
def on_block(self, conn, message): pass
def on_getaddr(self, conn, message): pass
def on_headers(self, conn, message): pass
def on_getheaders(self, conn, message): pass
def on_ping(self, conn, message):
if conn.ver_send > BIP0031_VERSION:
conn.send_message(msg_pong(message.nonce))
def on_reject(self, conn, message): pass
def on_close(self, conn): pass
def on_mempool(self, conn): pass
def on_pong(self, conn, message): pass
# The actual NodeConn class
# This class provides an interface for a p2p connection to a specified node
class NodeConn(asyncore.dispatcher):
messagemap = {
"version": msg_version,
"verack": msg_verack,
"addr": msg_addr,
"alert": msg_alert,
"inv": msg_inv,
"getdata": msg_getdata,
"getblocks": msg_getblocks,
"tx": msg_tx,
"block": msg_block,
"getaddr": msg_getaddr,
"ping": msg_ping,
"pong": msg_pong,
"headers": msg_headers,
"getheaders": msg_getheaders,
"reject": msg_reject,
"mempool": msg_mempool
}
MAGIC_BYTES = {
"mainnet": "\xf9\xbe\xb4\xd9", # mainnet
"testnet3": "\x0b\x11\x09\x07", # testnet3
"regtest": "\xfa\xbf\xb5\xda" # regtest
}
def __init__(self, dstaddr, dstport, rpc, callback, net="regtest"):
asyncore.dispatcher.__init__(self)
self.log = logging.getLogger("NodeConn(%s:%d)" % (dstaddr, dstport))
self.dstaddr = dstaddr
self.dstport = dstport
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.sendbuf = ""
self.recvbuf = ""
self.ver_send = 209
self.ver_recv = 209
self.last_sent = 0
self.state = "connecting"
self.network = net
self.cb = callback
self.sendbufLock = Lock() # for protecting the sendbuffer
self.disconnect = False
# stuff version msg into sendbuf
vt = msg_version()
vt.addrTo.ip = self.dstaddr
vt.addrTo.port = self.dstport
vt.addrFrom.ip = "0.0.0.0"
vt.addrFrom.port = 0
self.send_message(vt, True)
print 'MiniNode: Connecting to Bitcoin Node IP # ' + dstaddr + ':' \
+ str(dstport)
try:
self.connect((dstaddr, dstport))
except:
self.handle_close()
self.rpc = rpc
def show_debug_msg(self, msg):
self.log.debug(msg)
def handle_connect(self):
self.show_debug_msg("MiniNode: Connected & Listening: \n")
self.state = "connected"
def handle_close(self):
self.show_debug_msg("MiniNode: Closing Connection to %s:%d... "
% (self.dstaddr, self.dstport))
self.state = "closed"
self.recvbuf = ""
self.sendbuf = ""
try:
self.close()
except:
pass
self.cb.on_close(self)
def handle_read(self):
try:
t = self.recv(8192)
if len(t) > 0:
self.recvbuf += t
self.got_data()
except:
pass
def readable(self):
return True
def writable(self):
if self.disconnect:
self.handle_close()
return False
else:
self.sendbufLock.acquire()
length = len(self.sendbuf)
self.sendbufLock.release()
return (length > 0)
def handle_write(self):
self.sendbufLock.acquire()
try:
sent = self.send(self.sendbuf)
except:
self.handle_close()
return
self.sendbuf = self.sendbuf[sent:]
self.sendbufLock.release()
def got_data(self):
while True:
if len(self.recvbuf) < 4:
return
if self.recvbuf[:4] != self.MAGIC_BYTES[self.network]:
raise ValueError("got garbage %s" % repr(self.recvbuf))
if self.ver_recv < 209:
if len(self.recvbuf) < 4 + 12 + 4:
return
command = self.recvbuf[4:4+12].split("\x00", 1)[0]
msglen = struct.unpack("<i", self.recvbuf[4+12:4+12+4])[0]
checksum = None
if len(self.recvbuf) < 4 + 12 + 4 + msglen:
return
msg = self.recvbuf[4+12+4:4+12+4+msglen]
self.recvbuf = self.recvbuf[4+12+4+msglen:]
else:
if len(self.recvbuf) < 4 + 12 + 4 + 4:
return
command = self.recvbuf[4:4+12].split("\x00", 1)[0]
msglen = struct.unpack("<i", self.recvbuf[4+12:4+12+4])[0]
checksum = self.recvbuf[4+12+4:4+12+4+4]
if len(self.recvbuf) < 4 + 12 + 4 + 4 + msglen:
return
msg = self.recvbuf[4+12+4+4:4+12+4+4+msglen]
th = sha256(msg)
h = sha256(th)
if checksum != h[:4]:
raise ValueError("got bad checksum " + repr(self.recvbuf))
self.recvbuf = self.recvbuf[4+12+4+4+msglen:]
if command in self.messagemap:
f = cStringIO.StringIO(msg)
t = self.messagemap[command]()
t.deserialize(f)
self.got_message(t)
else:
self.show_debug_msg("Unknown command: '" + command + "' " +
repr(msg))
def send_message(self, message, pushbuf=False):
if self.state != "connected" and not pushbuf:
return
self.sendbufLock.acquire()
self.show_debug_msg("Send %s" % repr(message))
command = message.command
data = message.serialize()
tmsg = self.MAGIC_BYTES[self.network]
tmsg += command
tmsg += "\x00" * (12 - len(command))
tmsg += struct.pack("<I", len(data))
if self.ver_send >= 209:
th = sha256(data)
h = sha256(th)
tmsg += h[:4]
tmsg += data
self.sendbuf += tmsg
self.last_sent = time.time()
self.sendbufLock.release()
def got_message(self, message):
if message.command == "version":
if message.nVersion <= BIP0031_VERSION:
self.messagemap['ping'] = msg_ping_prebip31
if self.last_sent + 30 * 60 < time.time():
self.send_message(self.messagemap['ping']())
self.show_debug_msg("Recv %s" % repr(message))
self.cb.deliver(self, message)
def disconnect_node(self):
self.disconnect = True
self.send_message(self.messagemap['ping']())
class NetworkThread(Thread):
def run(self):
asyncore.loop(0.1, True)
# An exception we can raise if we detect a potential disconnect
# (p2p or rpc) before the test is complete
class EarlyDisconnectError(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
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