[tests] Test disconnecting unsupported service bits logic.

In v0.15, we disconnect nodes that send us version messages with
unsupported service bits (1 << 5 and 1 << 7). This commit adds a test
that bitcoind will disconnect those nodes before August 1st 2018, and won't
disconnect those nodes after August 1st 2018.

test/functional/p2p-leaktests.py

@@ -9,7 +9,10 @@ received a VERACK.
 
 This test connects to a node and sends it a few messages, trying to intice it
 into sending us something it shouldn't.
-"""
+
+Also test that nodes that send unsupported service bits to bitcoind are disconnected
+and don't receive a VERACK. Unsupported service bits are currently 1 << 5 and
+1 << 7 (until August 1st 2018)."""
 
 from test_framework.mininode import *
 from test_framework.test_framework import BitcoinTestFramework
@@ -98,20 +101,29 @@ class P2PLeakTest(BitcoinTestFramework):
         no_version_bannode = CNodeNoVersionBan()
         no_version_idlenode = CNodeNoVersionIdle()
         no_verack_idlenode = CNodeNoVerackIdle()
+        unsupported_service_bit5_node = CLazyNode()
+        unsupported_service_bit7_node = CLazyNode()
 
+        self.nodes[0].setmocktime(1501545600)  # August 1st 2017
         connections = []
         connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_version_bannode, send_version=False))
         connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_version_idlenode, send_version=False))
         connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_verack_idlenode))
+        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], unsupported_service_bit5_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_5))
+        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], unsupported_service_bit7_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_7))
         no_version_bannode.add_connection(connections[0])
         no_version_idlenode.add_connection(connections[1])
         no_verack_idlenode.add_connection(connections[2])
+        unsupported_service_bit5_node.add_connection(connections[3])
+        unsupported_service_bit7_node.add_connection(connections[4])
 
         NetworkThread().start()  # Start up network handling in another thread
 
         assert wait_until(lambda: no_version_bannode.ever_connected, timeout=10)
         assert wait_until(lambda: no_version_idlenode.ever_connected, timeout=10)
         assert wait_until(lambda: no_verack_idlenode.version_received, timeout=10)
+        assert wait_until(lambda: unsupported_service_bit5_node.ever_connected, timeout=10)
+        assert wait_until(lambda: unsupported_service_bit7_node.ever_connected, timeout=10)
 
         # Mine a block and make sure that it's not sent to the connected nodes
         self.nodes[0].generate(1)
@@ -122,12 +134,32 @@ class P2PLeakTest(BitcoinTestFramework):
         #This node should have been banned
         assert not no_version_bannode.connected
 
+        # These nodes should have been disconnected
+        assert not unsupported_service_bit5_node.connected
+        assert not unsupported_service_bit7_node.connected
+
         [conn.disconnect_node() for conn in connections]
 
         # Make sure no unexpected messages came in
         assert(no_version_bannode.unexpected_msg == False)
         assert(no_version_idlenode.unexpected_msg == False)
         assert(no_verack_idlenode.unexpected_msg == False)
+        assert not unsupported_service_bit5_node.unexpected_msg
+        assert not unsupported_service_bit7_node.unexpected_msg
+
+        self.log.info("Service bits 5 and 7 are allowed after August 1st 2018")
+        self.nodes[0].setmocktime(1533168000)  # August 2nd 2018
+
+        allowed_service_bit5_node = NodeConnCB()
+        allowed_service_bit7_node = NodeConnCB()
+
+        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], allowed_service_bit5_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_5))
+        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], allowed_service_bit7_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_7))
+        allowed_service_bit5_node.add_connection(connections[5])
+        allowed_service_bit7_node.add_connection(connections[6])
+
+        assert wait_until(lambda: allowed_service_bit5_node.message_count["verack"], timeout=10)
+        assert wait_until(lambda: allowed_service_bit7_node.message_count["verack"], timeout=10)
 
 if __name__ == '__main__':
     P2PLeakTest().main()

test/functional/test_framework/mininode.py

@@ -51,6 +51,8 @@ NODE_NETWORK = (1 << 0)
 NODE_GETUTXO = (1 << 1)
 NODE_BLOOM = (1 << 2)
 NODE_WITNESS = (1 << 3)
+NODE_UNSUPPORTED_SERVICE_BIT_5 = (1 << 5)
+NODE_UNSUPPORTED_SERVICE_BIT_7 = (1 << 7)
 
 logger = logging.getLogger("TestFramework.mininode")