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#!/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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from test_framework.messages import CInv, msg_getdata
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from test_framework.mininode import NODE_BLOOM, NODE_NETWORK_LIMITED, NODE_WITNESS, NetworkThread, P2PInterface
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal
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class P2PIgnoreInv(P2PInterface):
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def on_inv(self, message):
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# The node will send us invs for other blocks. Ignore them.
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pass
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class NodeNetworkLimitedTest(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 = [['-prune=550']]
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def get_signalled_service_flags(self):
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node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
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NetworkThread().start()
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node.wait_for_verack()
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services = node.nServices
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self.nodes[0].disconnect_p2ps()
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node.wait_for_disconnect()
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return services
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def try_get_block_via_getdata(self, blockhash, must_disconnect):
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node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
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NetworkThread().start()
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node.wait_for_verack()
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getdata_request = msg_getdata()
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getdata_request.inv.append(CInv(2, int(blockhash, 16)))
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node.send_message(getdata_request)
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if (must_disconnect):
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# Ensure we get disconnected
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node.wait_for_disconnect(5)
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else:
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# check if the peer sends us the requested block
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node.wait_for_block(int(blockhash, 16), 3)
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self.nodes[0].disconnect_p2ps()
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node.wait_for_disconnect()
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def run_test(self):
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# NODE_BLOOM & NODE_WITNESS & NODE_NETWORK_LIMITED must now be signaled
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assert_equal(self.get_signalled_service_flags(), NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED)
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# Now mine some blocks over the NODE_NETWORK_LIMITED + 2(racy buffer ext.) target
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firstblock = self.nodes[0].generate(1)[0]
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blocks = self.nodes[0].generate(292)
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block_within_limited_range = blocks[-1]
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# Make sure we can max retrive block at tip-288
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# requesting block at height 2 (tip-289) must fail (ignored)
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self.try_get_block_via_getdata(firstblock, True) # first block must lead to disconnect
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self.try_get_block_via_getdata(blocks[1], False) # last block in valid range
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self.try_get_block_via_getdata(blocks[0], True) # first block outside of the 288+2 limit
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# NODE_NETWORK_LIMITED must still be signaled after restart
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self.restart_node(0)
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assert_equal(self.get_signalled_service_flags(), NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED)
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# Test the RPC service flags
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assert_equal(int(self.nodes[0].getnetworkinfo()['localservices'], 16), NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED)
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# getdata a block above the NODE_NETWORK_LIMITED threshold must be possible
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self.try_get_block_via_getdata(block_within_limited_range, False)
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# getdata a block below the NODE_NETWORK_LIMITED threshold must be ignored
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self.try_get_block_via_getdata(firstblock, True)
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if __name__ == '__main__':
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NodeNetworkLimitedTest().main()
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