e353d271f0
53f6775 fixup: fix nits (John Newbery) a433d8a [tests] Update start/stop node functions to be private module functions (John Newbery) d8c218f [tests] Functional tests call self.start_node(s) and self.stop_node(s) (John Newbery) Tree-SHA512: 9cc01584a5e57686b7e7cb1c4c5186ad8cc7eb650d6d4f27b06bdb5e249a10966705814bdfb22d9ff2d5d3326911e489bf3d22257d751a299c0b24b7f40bffb5
180 lines
7.2 KiB
Python
Executable File
180 lines
7.2 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2015-2016 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 respecteved 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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import time
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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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class TestNode(NodeConnCB):
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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, conn, message):
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pass
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def on_block(self, conn, 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 __init__(self):
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super().__init__()
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self.setup_clean_chain = True
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self.num_nodes = 1
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self.extra_args = [["-maxuploadtarget=200", "-blockmaxsize=999000", "-maxtipage="+str(2*60*60*24*7)]]
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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 run_test(self):
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# Advance all nodes 2 weeks in the future
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old_mocktime = get_mocktime()
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current_mocktime = old_mocktime + 2*60*60*24*7
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set_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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# test_nodes[0] will only request old blocks
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# test_nodes[1] will only request new blocks
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# test_nodes[2] will test resetting the counters
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test_nodes = []
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connections = []
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for i in range(3):
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test_nodes.append(TestNode())
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_nodes[i]))
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test_nodes[i].add_connection(connections[i])
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NetworkThread().start() # Start up network handling in another thread
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[x.wait_for_verack() for x in test_nodes]
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# Test logic begins here
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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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# test_nodes[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(2, big_old_block))
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max_bytes_per_day = 200*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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test_nodes[0].send_message(getdata_request)
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test_nodes[0].sync_with_ping()
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assert_equal(test_nodes[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 i in range(3):
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test_nodes[0].send_message(getdata_request)
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test_nodes[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 test_nodes[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(2, big_new_block)]
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for i in range(200):
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test_nodes[1].send_message(getdata_request)
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test_nodes[1].sync_with_ping()
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assert_equal(test_nodes[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 test_nodes[1] tries for an old block, it gets disconnected too.
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getdata_request.inv = [CInv(2, big_old_block)]
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test_nodes[1].send_message(getdata_request)
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test_nodes[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 test_nodes[2] should be able to retrieve the old block.
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self.nodes[0].setmocktime(current_mocktime)
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test_nodes[2].sync_with_ping()
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test_nodes[2].send_message(getdata_request)
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test_nodes[2].sync_with_ping()
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assert_equal(test_nodes[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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[c.disconnect_node() for c in connections]
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#stop and start node 0 with 1MB maxuploadtarget, whitelist 127.0.0.1
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self.log.info("Restarting nodes with -whitelist=127.0.0.1")
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self.stop_node(0)
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self.nodes[0] = self.start_node(0, self.options.tmpdir, ["-whitelist=127.0.0.1", "-maxuploadtarget=1", "-blockmaxsize=999000", "-maxtipage="+str(2*60*60*24*7)])
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#recreate/reconnect a test node
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test_nodes = [TestNode()]
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connections = [NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_nodes[0])]
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test_nodes[0].add_connection(connections[0])
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NetworkThread().start() # Start up network handling in another thread
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test_nodes[0].wait_for_verack()
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#retrieve 20 blocks which should be enough to break the 1MB limit
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getdata_request.inv = [CInv(2, big_new_block)]
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for i in range(20):
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test_nodes[0].send_message(getdata_request)
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test_nodes[0].sync_with_ping()
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assert_equal(test_nodes[0].block_receive_map[big_new_block], i+1)
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getdata_request.inv = [CInv(2, big_old_block)]
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test_nodes[0].send_and_ping(getdata_request)
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assert_equal(len(self.nodes[0].getpeerinfo()), 1) #node is still connected because of the whitelist
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self.log.info("Peer still connected after trying to download old block (whitelisted)")
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if __name__ == '__main__':
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MaxUploadTest().main()
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