p2p_seednode.py raw

   1  #!/usr/bin/env python3
   2  # Copyright (c) 2019-present The Bitcoin Core developers
   3  # Distributed under the MIT software license, see the accompanying
   4  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5  
   6  """
   7  Test seednode interaction with the AddrMan
   8  """
   9  import random
  10  import time
  11  
  12  from test_framework.netutil import UNREACHABLE_PROXY_ARG
  13  from test_framework.test_framework import BitcoinTestFramework
  14  
  15  ADD_NEXT_SEEDNODE = 10
  16  
  17  
  18  class P2PSeedNodes(BitcoinTestFramework):
  19      def set_test_params(self):
  20          self.num_nodes = 1
  21          # Specify a non-working proxy to make sure no actual connections to random IPs are attempted.
  22          self.extra_args = [[UNREACHABLE_PROXY_ARG]]
  23          self.disable_autoconnect = False
  24  
  25      def test_no_seednode(self):
  26          self.log.info("Check that if no seednode is provided, the node proceeds as usual (without waiting)")
  27          with self.nodes[0].assert_debug_log(expected_msgs=[], unexpected_msgs=["Empty addrman, adding seednode", f"Couldn't connect to peers from addrman after {ADD_NEXT_SEEDNODE} seconds. Adding seednode"], timeout=ADD_NEXT_SEEDNODE):
  28              self.restart_node(0, extra_args=self.nodes[0].extra_args)
  29  
  30      def test_seednode_empty_addrman(self):
  31          seed_node = "25.0.0.1"
  32          self.log.info("Check that the seednode is immediately added on bootstrap on an empty addrman")
  33          with self.nodes[0].assert_debug_log(expected_msgs=[f"Empty addrman, adding seednode ({seed_node}) to addrfetch"], timeout=ADD_NEXT_SEEDNODE):
  34              self.restart_node(0, extra_args=self.nodes[0].extra_args + [f'-seednode={seed_node}'])
  35  
  36      def test_seednode_non_empty_addrman(self):
  37          self.log.info("Check that if addrman is non-empty, seednodes are queried with a delay")
  38          seed_node = "25.0.0.2"
  39          node = self.nodes[0]
  40          # Fill the addrman with unreachable nodes
  41          for i in range(10):
  42              ip = f"{random.randrange(128,169)}.{random.randrange(1,255)}.{random.randrange(1,255)}.{random.randrange(1,255)}"
  43              port = 8333 + i
  44              node.addpeeraddress(ip, port)
  45  
  46          # Restart the node so seednode is processed again.
  47          with node.assert_debug_log(expected_msgs=["trying v1 connection"], timeout=ADD_NEXT_SEEDNODE):
  48              self.restart_node(0, extra_args=self.nodes[0].extra_args + [f'-seednode={seed_node}'])
  49  
  50          with node.assert_debug_log(expected_msgs=[f"Couldn't connect to peers from addrman after {ADD_NEXT_SEEDNODE} seconds. Adding seednode ({seed_node}) to addrfetch"], unexpected_msgs=["Empty addrman, adding seednode"], timeout=ADD_NEXT_SEEDNODE * 1.5):
  51              node.setmocktime(int(time.time()) + ADD_NEXT_SEEDNODE + 1)
  52  
  53      def run_test(self):
  54          self.test_no_seednode()
  55          self.test_seednode_empty_addrman()
  56          self.test_seednode_non_empty_addrman()
  57  
  58  
  59  if __name__ == '__main__':
  60      P2PSeedNodes(__file__).main()
  61