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f4ba2bb769
The flag fDIP0001ActiveAtTip shows a status of activation of DIP0001 This flag is used currently only in net.cpp for setup block buffer size. Assume the bigger by default so far as DIP0001 is activated years ago
172 lines
6.7 KiB
Python
Executable File
172 lines
6.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2015-2020 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 behavior of -maxuploadtarget.
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* Verify that getdata requests for old blocks (>1week) are dropped
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if uploadtarget has been reached.
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* Verify that getdata requests for recent blocks are respected even
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if uploadtarget has been reached.
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* Verify that the upload counters are reset after 24 hours.
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"""
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from collections import defaultdict
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from test_framework.messages import CInv, MAX_BLOCK_SIZE, MSG_BLOCK, msg_getdata
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from test_framework.p2p import P2PInterface
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal, mine_large_block, set_node_times
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class TestP2PConn(P2PInterface):
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def __init__(self):
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super().__init__()
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self.block_receive_map = defaultdict(int)
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def on_inv(self, message):
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pass
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def on_block(self, message):
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message.block.calc_sha256()
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self.block_receive_map[message.block.sha256] += 1
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class MaxUploadTest(BitcoinTestFramework):
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def set_test_params(self):
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self.setup_clean_chain = True
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self.num_nodes = 1
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self.extra_args = [[
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"-maxuploadtarget=400",
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"-acceptnonstdtxn=1",
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]]
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self.supports_cli = False
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# Cache for utxos, as the listunspent may take a long time later in the test
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self.utxo_cache = []
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def skip_test_if_missing_module(self):
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self.skip_if_no_wallet()
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def run_test(self):
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# Advance all nodes 2 weeks in the future
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old_mocktime = self.mocktime
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current_mocktime = old_mocktime + 2*60*60*24*7
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self.mocktime = current_mocktime
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set_node_times(self.nodes, current_mocktime)
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# Before we connect anything, we first set the time on the node
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# to be in the past, otherwise things break because the CNode
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# time counters can't be reset backward after initialization
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self.nodes[0].setmocktime(old_mocktime)
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# Generate some old blocks
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self.nodes[0].generate(130)
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# p2p_conns[0] will only request old blocks
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# p2p_conns[1] will only request new blocks
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# p2p_conns[2] will test resetting the counters
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p2p_conns = []
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for _ in range(3):
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p2p_conns.append(self.nodes[0].add_p2p_connection(TestP2PConn()))
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# Now mine a big block
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mine_large_block(self.nodes[0], self.utxo_cache)
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# Store the hash; we'll request this later
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big_old_block = self.nodes[0].getbestblockhash()
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old_block_size = self.nodes[0].getblock(big_old_block, True)['size']
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big_old_block = int(big_old_block, 16)
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# Advance to two days ago
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self.nodes[0].setmocktime(current_mocktime - 2*60*60*24)
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# Mine one more block, so that the prior block looks old
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mine_large_block(self.nodes[0], self.utxo_cache)
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# We'll be requesting this new block too
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big_new_block = self.nodes[0].getbestblockhash()
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big_new_block = int(big_new_block, 16)
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# p2p_conns[0] will test what happens if we just keep requesting the
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# the same big old block too many times (expect: disconnect)
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getdata_request = msg_getdata()
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getdata_request.inv.append(CInv(MSG_BLOCK, big_old_block))
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max_bytes_per_day = 400*1024*1024
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daily_buffer = 144 * MAX_BLOCK_SIZE
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max_bytes_available = max_bytes_per_day - daily_buffer
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success_count = max_bytes_available // old_block_size
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# 144MB will be reserved for relaying new blocks, so expect this to
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# succeed for ~70 tries.
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for i in range(success_count):
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p2p_conns[0].send_and_ping(getdata_request)
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assert_equal(p2p_conns[0].block_receive_map[big_old_block], i+1)
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assert_equal(len(self.nodes[0].getpeerinfo()), 3)
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# At most a couple more tries should succeed (depending on how long
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# the test has been running so far).
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for _ in range(3):
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p2p_conns[0].send_message(getdata_request)
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p2p_conns[0].wait_for_disconnect()
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assert_equal(len(self.nodes[0].getpeerinfo()), 2)
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self.log.info("Peer 0 disconnected after downloading old block too many times")
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# Requesting the current block on p2p_conns[1] should succeed indefinitely,
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# even when over the max upload target.
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# We'll try 200 times
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getdata_request.inv = [CInv(MSG_BLOCK, big_new_block)]
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for i in range(200):
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p2p_conns[1].send_and_ping(getdata_request)
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p2p_conns[1].sync_with_ping()
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assert_equal(p2p_conns[1].block_receive_map[big_new_block], i+1)
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self.log.info("Peer 1 able to repeatedly download new block")
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# But if p2p_conns[1] tries for an old block, it gets disconnected too.
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getdata_request.inv = [CInv(MSG_BLOCK, big_old_block)]
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p2p_conns[1].send_message(getdata_request)
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p2p_conns[1].wait_for_disconnect()
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assert_equal(len(self.nodes[0].getpeerinfo()), 1)
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self.log.info("Peer 1 disconnected after trying to download old block")
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self.log.info("Advancing system time on node to clear counters...")
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# If we advance the time by 24 hours, then the counters should reset,
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# and p2p_conns[2] should be able to retrieve the old block.
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self.nodes[0].setmocktime(current_mocktime)
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p2p_conns[2].sync_with_ping()
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p2p_conns[2].send_and_ping(getdata_request)
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assert_equal(p2p_conns[2].block_receive_map[big_old_block], 1)
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self.log.info("Peer 2 able to download old block")
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self.nodes[0].disconnect_p2ps()
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self.log.info("Restarting node 0 with download permission and 1MB maxuploadtarget")
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self.restart_node(0, ["-whitelist=download@127.0.0.1", "-maxuploadtarget=1", "-blockmaxsize=999000", "-mocktime="+str(current_mocktime)])
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# Reconnect to self.nodes[0]
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peer = self.nodes[0].add_p2p_connection(TestP2PConn())
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#retrieve 20 blocks which should be enough to break the 1MB limit
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getdata_request.inv = [CInv(MSG_BLOCK, big_new_block)]
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for i in range(20):
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peer.send_and_ping(getdata_request)
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assert_equal(peer.block_receive_map[big_new_block], i+1)
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getdata_request.inv = [CInv(MSG_BLOCK, big_old_block)]
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peer.send_and_ping(getdata_request)
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self.log.info("Peer still connected after trying to download old block (download permission)")
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peer_info = self.nodes[0].getpeerinfo()
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assert_equal(len(peer_info), 1) # node is still connected
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assert_equal(peer_info[0]['permissions'], ['download'])
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if __name__ == '__main__':
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MaxUploadTest().main()
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