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52bf616cc4
dash/test/functional/sendheaders.py
PastaPastaPasta 52bf616cc4
Merge #11712: [tests] Split NodeConn from NodeConnCB (#3373) 
* [tests] Remove mininode periodic (half-hour) ping messages

* [tests] Tidy up mininode

Add docstrings and renames some methods.
Also removes the redundant NodeConn.readable() method override.

* [tests] Move only: move NodeConnCB below NodeConn

This is required since NodeConnCB will inherit from NodeConn
after the next commit.

* [tests] Make NodeConnCB a subclass of NodeConn

This makes NodeConnCB a subclass of NodeConn, and
removes the need for the client code to know
anything about the implementation details of NodeConnCB.

NodeConn can now be swapped out for any other implementation
of a low-level connection without changing client code.

* [tests] Move version message sending from NodeConn to NodeConnCB

This commit moves the logic that sends a version message
on connection from NodeConn to NodeConnCB. NodeConn should
not be aware of the semantics or meaning of the P2P payloads.

* remove witness

Signed-off-by: Pasta <pasta@dashboost.org>

* Fix 11712

Co-authored-by: John Newbery <john@johnnewbery.com>
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
2020-04-05 14:12:45 +03:00

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#!/usr/bin/env python3
# Copyright (c) 2014-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test behavior of headers messages to announce blocks.
Setup:
- Two nodes:
- node0 is the node-under-test. We create two p2p connections to it. The
first p2p connection is a control and should only ever receive inv's. The
second p2p connection tests the headers sending logic.
- node1 is used to create reorgs.
test_null_locators
==================
Sends two getheaders requests with null locator values. First request's hashstop
value refers to validated block, while second request's hashstop value refers to
a block which hasn't been validated. Verifies only the first request returns
headers.
test_nonnull_locators
=====================
Part 1: No headers announcements before "sendheaders"
a. node mines a block [expect: inv]
send getdata for the block [expect: block]
b. node mines another block [expect: inv]
send getheaders and getdata [expect: headers, then block]
c. node mines another block [expect: inv]
peer mines a block, announces with header [expect: getdata]
d. node mines another block [expect: inv]
Part 2: After "sendheaders", headers announcements should generally work.
a. peer sends sendheaders [expect: no response]
peer sends getheaders with current tip [expect: no response]
b. node mines a block [expect: tip header]
c. for N in 1, ..., 10:
* for announce-type in {inv, header}
- peer mines N blocks, announces with announce-type
[ expect: getheaders/getdata or getdata, deliver block(s) ]
- node mines a block [ expect: 1 header ]
Part 3: Headers announcements stop after large reorg and resume after getheaders or inv from peer.
- For response-type in {inv, getheaders}
* node mines a 7 block reorg [ expect: headers announcement of 8 blocks ]
* node mines an 8-block reorg [ expect: inv at tip ]
* peer responds with getblocks/getdata [expect: inv, blocks ]
* node mines another block [ expect: inv at tip, peer sends getdata, expect: block ]
* node mines another block at tip [ expect: inv ]
* peer responds with getheaders with an old hashstop more than 8 blocks back [expect: headers]
* peer requests block [ expect: block ]
* node mines another block at tip [ expect: inv, peer sends getdata, expect: block ]
* peer sends response-type [expect headers if getheaders, getheaders/getdata if mining new block]
* node mines 1 block [expect: 1 header, peer responds with getdata]
Part 4: Test direct fetch behavior
a. Announce 2 old block headers.
Expect: no getdata requests.
b. Announce 3 new blocks via 1 headers message.
Expect: one getdata request for all 3 blocks.
(Send blocks.)
c. Announce 1 header that forks off the last two blocks.
Expect: no response.
d. Announce 1 more header that builds on that fork.
Expect: one getdata request for two blocks.
e. Announce 16 more headers that build on that fork.
Expect: getdata request for 14 more blocks.
f. Announce 1 more header that builds on that fork.
Expect: no response.
Part 5: Test handling of headers that don't connect.
a. Repeat 10 times:
1. Announce a header that doesn't connect.
Expect: getheaders message
2. Send headers chain.
Expect: getdata for the missing blocks, tip update.
b. Then send 9 more headers that don't connect.
Expect: getheaders message each time.
c. Announce a header that does connect.
Expect: no response.
d. Announce 49 headers that don't connect.
Expect: getheaders message each time.
e. Announce one more that doesn't connect.
Expect: disconnect.
"""
from test_framework.blocktools import create_block, create_coinbase
from test_framework.mininode import (
CBlockHeader,
CInv,
network_thread_start,
NodeConnCB,
mininode_lock,
msg_block,
msg_getblocks,
msg_getdata,
msg_getheaders,
msg_headers,
msg_inv,
msg_sendheaders,
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
sync_blocks,
wait_until,
)
DIRECT_FETCH_RESPONSE_TIME = 0.05
class BaseNode(NodeConnCB):
def __init__(self):
super().__init__()
self.block_announced = False
self.last_blockhash_announced = None
def send_get_data(self, block_hashes):
"""Request data for a list of block hashes."""
msg = msg_getdata()
for x in block_hashes:
msg.inv.append(CInv(2, x))
self.send_message(msg)
def send_get_headers(self, locator, hashstop):
msg = msg_getheaders()
msg.locator.vHave = locator
msg.hashstop = hashstop
self.send_message(msg)
def send_block_inv(self, blockhash):
msg = msg_inv()
msg.inv = [CInv(2, blockhash)]
self.send_message(msg)
def send_header_for_blocks(self, new_blocks):
headers_message = msg_headers()
headers_message.headers = [CBlockHeader(b) for b in new_blocks]
self.send_message(headers_message)
def send_getblocks(self, locator):
getblocks_message = msg_getblocks()
getblocks_message.locator.vHave = locator
self.send_message(getblocks_message)
def wait_for_getdata(self, hash_list, timeout=60):
if hash_list == []:
return
test_function = lambda: "getdata" in self.last_message and [x.hash for x in self.last_message["getdata"].inv] == hash_list
wait_until(test_function, timeout=timeout, lock=mininode_lock)
def wait_for_block_announcement(self, block_hash, timeout=60):
test_function = lambda: self.last_blockhash_announced == block_hash
wait_until(test_function, timeout=timeout, lock=mininode_lock)
def on_inv(self, message):
self.block_announced = True
self.last_blockhash_announced = message.inv[-1].hash
def on_headers(self, message):
if len(message.headers):
self.block_announced = True
message.headers[-1].calc_sha256()
self.last_blockhash_announced = message.headers[-1].sha256
def clear_last_announcement(self):
with mininode_lock:
self.block_announced = False
self.last_message.pop("inv", None)
self.last_message.pop("headers", None)
def check_last_announcement(self, headers=None, inv=None):
"""Test whether the last announcement received had the right header or the right inv.
inv and headers should be lists of block hashes."""
test_function = lambda: self.block_announced
wait_until(test_function, timeout=60, lock=mininode_lock)
with mininode_lock:
self.block_announced = False
compare_inv = []
if "inv" in self.last_message:
compare_inv = [x.hash for x in self.last_message["inv"].inv]
if inv is not None:
assert_equal(compare_inv, inv)
compare_headers = []
if "headers" in self.last_message:
compare_headers = [x.sha256 for x in self.last_message["headers"].headers]
if headers is not None:
assert_equal(compare_headers, headers)
self.last_message.pop("inv", None)
self.last_message.pop("headers", None)
class SendHeadersTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 2
def mine_blocks(self, count):
"""Mine count blocks and return the new tip."""
# Clear out last block announcement from each p2p listener
[x.clear_last_announcement() for x in self.nodes[0].p2ps]
self.nodes[0].generate(count)
return int(self.nodes[0].getbestblockhash(), 16)
def mine_reorg(self, length):
"""Mine a reorg that invalidates length blocks (replacing them with # length+1 blocks).
Note: we clear the state of our p2p connections after the
to-be-reorged-out blocks are mined, so that we don't break later tests.
return the list of block hashes newly mined."""
self.nodes[0].generate(length) # make sure all invalidated blocks are node0's
sync_blocks(self.nodes, wait=0.1)
for x in self.nodes[0].p2ps:
x.wait_for_block_announcement(int(self.nodes[0].getbestblockhash(), 16))
x.clear_last_announcement()
tip_height = self.nodes[1].getblockcount()
hash_to_invalidate = self.nodes[1].getblockhash(tip_height - (length - 1))
self.nodes[1].invalidateblock(hash_to_invalidate)
all_hashes = self.nodes[1].generate(length + 1) # Must be longer than the orig chain
sync_blocks(self.nodes, wait=0.1)
return [int(x, 16) for x in all_hashes]
def run_test(self):
# Setup the p2p connections and start up the network thread.
inv_node = self.nodes[0].add_p2p_connection(BaseNode())
# Make sure NODE_NETWORK is not set for test_node, so no block download
# will occur outside of direct fetching
test_node = self.nodes[0].add_p2p_connection(BaseNode(), services=0)
network_thread_start()
# Test logic begins here
inv_node.wait_for_verack()
test_node.wait_for_verack()
# Ensure verack's have been processed by our peer
inv_node.sync_with_ping()
test_node.sync_with_ping()
self.test_null_locators(test_node, inv_node)
self.test_nonnull_locators(test_node, inv_node)
def test_null_locators(self, test_node, inv_node):
tip = self.nodes[0].getblockheader(self.nodes[0].generate(1)[0])
tip_hash = int(tip["hash"], 16)
inv_node.check_last_announcement(inv=[tip_hash], headers=[])
test_node.check_last_announcement(inv=[tip_hash], headers=[])
self.log.info("Verify getheaders with null locator and valid hashstop returns headers.")
test_node.clear_last_announcement()
test_node.send_get_headers(locator=[], hashstop=tip_hash)
test_node.check_last_announcement(headers=[tip_hash])
self.log.info("Verify getheaders with null locator and invalid hashstop does not return headers.")
block = create_block(int(tip["hash"], 16), create_coinbase(tip["height"] + 1), tip["mediantime"] + 1)
block.solve()
test_node.send_header_for_blocks([block])
test_node.clear_last_announcement()
test_node.send_get_headers(locator=[], hashstop=int(block.hash, 16))
test_node.sync_with_ping()
assert_equal(test_node.block_announced, False)
inv_node.clear_last_announcement()
test_node.send_message(msg_block(block))
inv_node.check_last_announcement(inv=[int(block.hash, 16)], headers=[])
def test_nonnull_locators(self, test_node, inv_node):
tip = int(self.nodes[0].getbestblockhash(), 16)
# PART 1
# 1. Mine a block; expect inv announcements each time
self.log.info("Part 1: headers don't start before sendheaders message...")
for i in range(4):
old_tip = tip
tip = self.mine_blocks(1)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(inv=[tip], headers=[])
# Try a few different responses; none should affect next announcement
if i == 0:
# first request the block
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 1:
# next try requesting header and block
test_node.send_get_headers(locator=[old_tip], hashstop=tip)
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
test_node.clear_last_announcement() # since we requested headers...
elif i == 2:
# this time announce own block via headers
height = self.nodes[0].getblockcount()
last_time = self.nodes[0].getblock(self.nodes[0].getbestblockhash())['time']
block_time = last_time + 1
new_block = create_block(tip, create_coinbase(height + 1), block_time)
new_block.solve()
test_node.send_header_for_blocks([new_block])
test_node.wait_for_getdata([new_block.sha256])
test_node.send_message(msg_block(new_block))
test_node.sync_with_ping() # make sure this block is processed
inv_node.clear_last_announcement()
test_node.clear_last_announcement()
self.log.info("Part 1: success!")
self.log.info("Part 2: announce blocks with headers after sendheaders message...")
# PART 2
# 2. Send a sendheaders message and test that headers announcements
# commence and keep working.
test_node.send_message(msg_sendheaders())
prev_tip = int(self.nodes[0].getbestblockhash(), 16)
test_node.send_get_headers(locator=[prev_tip], hashstop=0)
test_node.sync_with_ping()
# Now that we've synced headers, headers announcements should work
tip = self.mine_blocks(1)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=[tip])
height = self.nodes[0].getblockcount() + 1
block_time += 10 # Advance far enough ahead
for i in range(10):
# Mine i blocks, and alternate announcing either via
# inv (of tip) or via headers. After each, new blocks
# mined by the node should successfully be announced
# with block header, even though the blocks are never requested
for j in range(2):
blocks = []
for b in range(i + 1):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
if j == 0:
# Announce via inv
test_node.send_block_inv(tip)
test_node.wait_for_getheaders()
# Should have received a getheaders now
test_node.send_header_for_blocks(blocks)
# Test that duplicate inv's won't result in duplicate
# getdata requests, or duplicate headers announcements
[inv_node.send_block_inv(x.sha256) for x in blocks]
test_node.wait_for_getdata([x.sha256 for x in blocks])
inv_node.sync_with_ping()
else:
# Announce via headers
test_node.send_header_for_blocks(blocks)
test_node.wait_for_getdata([x.sha256 for x in blocks])
# Test that duplicate headers won't result in duplicate
# getdata requests (the check is further down)
inv_node.send_header_for_blocks(blocks)
inv_node.sync_with_ping()
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
inv_node.sync_with_ping()
# This block should not be announced to the inv node (since it also
# broadcast it)
assert "inv" not in inv_node.last_message
assert "headers" not in inv_node.last_message
tip = self.mine_blocks(1)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=[tip])
height += 1
block_time += 1
self.log.info("Part 2: success!")
self.log.info("Part 3: headers announcements can stop after large reorg, and resume after headers/inv from peer...")
# PART 3. Headers announcements can stop after large reorg, and resume after
# getheaders or inv from peer.
for j in range(2):
# First try mining a reorg that can propagate with header announcement
new_block_hashes = self.mine_reorg(length=7)
tip = new_block_hashes[-1]
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=new_block_hashes)
block_time += 8
# Mine a too-large reorg, which should be announced with a single inv
new_block_hashes = self.mine_reorg(length=8)
tip = new_block_hashes[-1]
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(inv=[tip], headers=[])
block_time += 9
fork_point = self.nodes[0].getblock("%02x" % new_block_hashes[0])["previousblockhash"]
fork_point = int(fork_point, 16)
# Use getblocks/getdata
test_node.send_getblocks(locator=[fork_point])
test_node.check_last_announcement(inv=new_block_hashes, headers=[])
test_node.send_get_data(new_block_hashes)
test_node.wait_for_block(new_block_hashes[-1])
for i in range(3):
# Mine another block, still should get only an inv
tip = self.mine_blocks(1)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(inv=[tip], headers=[])
if i == 0:
# Just get the data -- shouldn't cause headers announcements to resume
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 1:
# Send a getheaders message that shouldn't trigger headers announcements
# to resume (best header sent will be too old)
test_node.send_get_headers(locator=[fork_point], hashstop=new_block_hashes[1])
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 2:
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
# This time, try sending either a getheaders to trigger resumption
# of headers announcements, or mine a new block and inv it, also
# triggering resumption of headers announcements.
if j == 0:
test_node.send_get_headers(locator=[tip], hashstop=0)
test_node.sync_with_ping()
else:
test_node.send_block_inv(tip)
test_node.sync_with_ping()
# New blocks should now be announced with header
tip = self.mine_blocks(1)
inv_node.check_last_announcement(inv=[tip], headers=[])
test_node.check_last_announcement(headers=[tip])
self.log.info("Part 3: success!")
self.log.info("Part 4: Testing direct fetch behavior...")
tip = self.mine_blocks(1)
height = self.nodes[0].getblockcount() + 1
last_time = self.nodes[0].getblock(self.nodes[0].getbestblockhash())['time']
block_time = last_time + 1
# Create 2 blocks. Send the blocks, then send the headers.
blocks = []
for b in range(2):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
inv_node.send_message(msg_block(blocks[-1]))
inv_node.sync_with_ping() # Make sure blocks are processed
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks)
test_node.sync_with_ping()
# should not have received any getdata messages
with mininode_lock:
assert "getdata" not in test_node.last_message
# This time, direct fetch should work
blocks = []
for b in range(3):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
test_node.send_header_for_blocks(blocks)
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks], timeout=DIRECT_FETCH_RESPONSE_TIME)
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
# Now announce a header that forks the last two blocks
tip = blocks[0].sha256
height -= 1
blocks = []
# Create extra blocks for later
for b in range(20):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
# Announcing one block on fork should not trigger direct fetch
# (less work than tip)
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks[0:1])
test_node.sync_with_ping()
with mininode_lock:
assert "getdata" not in test_node.last_message
# Announcing one more block on fork should trigger direct fetch for
# both blocks (same work as tip)
test_node.send_header_for_blocks(blocks[1:2])
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks[0:2]], timeout=DIRECT_FETCH_RESPONSE_TIME)
# Announcing 16 more headers should trigger direct fetch for 14 more
# blocks
test_node.send_header_for_blocks(blocks[2:18])
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks[2:16]], timeout=DIRECT_FETCH_RESPONSE_TIME)
# Announcing 1 more header should not trigger any response
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks[18:19])
test_node.sync_with_ping()
with mininode_lock:
assert "getdata" not in test_node.last_message
self.log.info("Part 4: success!")
# Now deliver all those blocks we announced.
[test_node.send_message(msg_block(x)) for x in blocks]
self.log.info("Part 5: Testing handling of unconnecting headers")
# First we test that receipt of an unconnecting header doesn't prevent
# chain sync.
for i in range(10):
test_node.last_message.pop("getdata", None)
blocks = []
# Create two more blocks.
for j in range(2):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
# Send the header of the second block -> this won't connect.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[1]])
test_node.wait_for_getheaders()
test_node.send_header_for_blocks(blocks)
test_node.wait_for_getdata([x.sha256 for x in blocks])
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
assert_equal(int(self.nodes[0].getbestblockhash(), 16), blocks[1].sha256)
blocks = []
# Now we test that if we repeatedly don't send connecting headers, we
# don't go into an infinite loop trying to get them to connect.
MAX_UNCONNECTING_HEADERS = 10
for j in range(MAX_UNCONNECTING_HEADERS + 1):
blocks.append(create_block(tip, create_coinbase(height), block_time))
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
for i in range(1, MAX_UNCONNECTING_HEADERS):
# Send a header that doesn't connect, check that we get a getheaders.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[i]])
test_node.wait_for_getheaders()
# Next header will connect, should re-set our count:
test_node.send_header_for_blocks([blocks[0]])
# Remove the first two entries (blocks[1] would connect):
blocks = blocks[2:]
# Now try to see how many unconnecting headers we can send
# before we get disconnected. Should be 5*MAX_UNCONNECTING_HEADERS
for i in range(5 * MAX_UNCONNECTING_HEADERS - 1):
# Send a header that doesn't connect, check that we get a getheaders.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[i % len(blocks)]])
test_node.wait_for_getheaders()
# Eventually this stops working.
test_node.send_header_for_blocks([blocks[-1]])
# Should get disconnected
test_node.wait_for_disconnect()
self.log.info("Part 5: success!")
# Finally, check that the inv node never received a getdata request,
# throughout the test
assert "getdata" not in inv_node.last_message
if __name__ == '__main__':
SendHeadersTest().main()
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