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166 lines
7.8 KiB
Python
Executable File
166 lines
7.8 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2017 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Test message sending before handshake completion.
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A node should never send anything other than VERSION/VERACK/REJECT until it's
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received a VERACK.
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This test connects to a node and sends it a few messages, trying to intice it
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into sending us something it shouldn't.
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Also test that nodes that send unsupported service bits to bitcoind are disconnected
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and don't receive a VERACK. Unsupported service bits are currently 1 << 5 and
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1 << 7 (until August 1st 2018)."""
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from test_framework.mininode import *
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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banscore = 10
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class CLazyNode(NodeConnCB):
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def __init__(self):
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super().__init__()
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self.unexpected_msg = False
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self.ever_connected = False
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def bad_message(self, message):
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self.unexpected_msg = True
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self.log.info("should not have received message: %s" % message.command)
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def on_open(self, conn):
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self.connected = True
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self.ever_connected = True
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def on_version(self, conn, message): self.bad_message(message)
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def on_verack(self, conn, message): self.bad_message(message)
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def on_reject(self, conn, message): self.bad_message(message)
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def on_inv(self, conn, message): self.bad_message(message)
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def on_addr(self, conn, message): self.bad_message(message)
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def on_alert(self, conn, message): self.bad_message(message)
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def on_getdata(self, conn, message): self.bad_message(message)
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def on_getblocks(self, conn, message): self.bad_message(message)
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def on_tx(self, conn, message): self.bad_message(message)
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def on_block(self, conn, message): self.bad_message(message)
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def on_getaddr(self, conn, message): self.bad_message(message)
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def on_headers(self, conn, message): self.bad_message(message)
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def on_getheaders(self, conn, message): self.bad_message(message)
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def on_ping(self, conn, message): self.bad_message(message)
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def on_mempool(self, conn): self.bad_message(message)
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def on_pong(self, conn, message): self.bad_message(message)
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def on_feefilter(self, conn, message): self.bad_message(message)
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def on_sendheaders(self, conn, message): self.bad_message(message)
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def on_sendcmpct(self, conn, message): self.bad_message(message)
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def on_cmpctblock(self, conn, message): self.bad_message(message)
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def on_getblocktxn(self, conn, message): self.bad_message(message)
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def on_blocktxn(self, conn, message): self.bad_message(message)
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# Node that never sends a version. We'll use this to send a bunch of messages
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# anyway, and eventually get disconnected.
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class CNodeNoVersionBan(CLazyNode):
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# send a bunch of veracks without sending a message. This should get us disconnected.
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# NOTE: implementation-specific check here. Remove if bitcoind ban behavior changes
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def on_open(self, conn):
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super().on_open(conn)
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for i in range(banscore):
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self.send_message(msg_verack())
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def on_reject(self, conn, message): pass
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# Node that never sends a version. This one just sits idle and hopes to receive
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# any message (it shouldn't!)
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class CNodeNoVersionIdle(CLazyNode):
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def __init__(self):
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super().__init__()
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# Node that sends a version but not a verack.
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class CNodeNoVerackIdle(CLazyNode):
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def __init__(self):
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self.version_received = False
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super().__init__()
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def on_reject(self, conn, message): pass
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def on_verack(self, conn, message): pass
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# When version is received, don't reply with a verack. Instead, see if the
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# node will give us a message that it shouldn't. This is not an exhaustive
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# list!
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def on_version(self, conn, message):
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self.version_received = True
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conn.send_message(msg_ping())
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conn.send_message(msg_getaddr())
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class P2PLeakTest(BitcoinTestFramework):
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def __init__(self):
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super().__init__()
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self.num_nodes = 1
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self.extra_args = [['-banscore='+str(banscore)]]
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def run_test(self):
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no_version_bannode = CNodeNoVersionBan()
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no_version_idlenode = CNodeNoVersionIdle()
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no_verack_idlenode = CNodeNoVerackIdle()
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unsupported_service_bit5_node = CLazyNode()
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unsupported_service_bit7_node = CLazyNode()
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self.nodes[0].setmocktime(1501545600) # August 1st 2017
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connections = []
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_version_bannode, send_version=False))
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_version_idlenode, send_version=False))
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_verack_idlenode))
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], unsupported_service_bit5_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_5))
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], unsupported_service_bit7_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_7))
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no_version_bannode.add_connection(connections[0])
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no_version_idlenode.add_connection(connections[1])
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no_verack_idlenode.add_connection(connections[2])
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unsupported_service_bit5_node.add_connection(connections[3])
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unsupported_service_bit7_node.add_connection(connections[4])
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NetworkThread().start() # Start up network handling in another thread
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wait_until(lambda: no_version_bannode.ever_connected, timeout=10, lock=mininode_lock)
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wait_until(lambda: no_version_idlenode.ever_connected, timeout=10, lock=mininode_lock)
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wait_until(lambda: no_verack_idlenode.version_received, timeout=10, lock=mininode_lock)
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wait_until(lambda: unsupported_service_bit5_node.ever_connected, timeout=10, lock=mininode_lock)
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wait_until(lambda: unsupported_service_bit7_node.ever_connected, timeout=10, lock=mininode_lock)
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# Mine a block and make sure that it's not sent to the connected nodes
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self.nodes[0].generate(1)
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#Give the node enough time to possibly leak out a message
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time.sleep(5)
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#This node should have been banned
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assert not no_version_bannode.connected
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# These nodes should have been disconnected
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assert not unsupported_service_bit5_node.connected
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assert not unsupported_service_bit7_node.connected
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[conn.disconnect_node() for conn in connections]
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# Make sure no unexpected messages came in
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assert(no_version_bannode.unexpected_msg == False)
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assert(no_version_idlenode.unexpected_msg == False)
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assert(no_verack_idlenode.unexpected_msg == False)
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assert not unsupported_service_bit5_node.unexpected_msg
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assert not unsupported_service_bit7_node.unexpected_msg
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self.log.info("Service bits 5 and 7 are allowed after August 1st 2018")
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self.nodes[0].setmocktime(1533168000) # August 2nd 2018
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allowed_service_bit5_node = NodeConnCB()
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allowed_service_bit7_node = NodeConnCB()
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], allowed_service_bit5_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_5))
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], allowed_service_bit7_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_7))
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allowed_service_bit5_node.add_connection(connections[5])
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allowed_service_bit7_node.add_connection(connections[6])
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wait_until(lambda: allowed_service_bit5_node.message_count["verack"], timeout=10, lock=mininode_lock)
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wait_until(lambda: allowed_service_bit7_node.message_count["verack"], timeout=10, lock=mininode_lock)
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if __name__ == '__main__':
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P2PLeakTest().main()
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