net: Fix sent reject messages for blocks and transactions

Ever since we #5913 have been sending invalid reject messages
for transactions and blocks.

test: Add basic test for `reject` code

Extend P2P test framework to make it possible to expect reject
codes for transactions and blocks.

Github-Pull: #7179
Rebased-From: 9fc6ed6003 20411903d7

qa/pull-tester/rpc-tests.py

@@ -100,6 +100,8 @@ testScripts = [
     'sendheaders.py',
     'keypool.py',
     'prioritise_transaction.py',
+    'invalidblockrequest.py',
+    'invalidtxrequest.py',
 ]
 testScriptsExt = [
     'bip65-cltv.py',
@@ -116,7 +118,6 @@ testScriptsExt = [
 #    'rpcbind_test.py', #temporary, bug in libevent, see #6655
     'smartfees.py',
     'maxblocksinflight.py',
-    'invalidblockrequest.py',
     'p2p-acceptblock.py',
     'mempool_packages.py',
     'maxuploadtarget.py',

qa/rpc-tests/invalidblockrequest.py

@@ -6,7 +6,7 @@
 
 from test_framework.test_framework import ComparisonTestFramework
 from test_framework.util import *
-from test_framework.comptool import TestManager, TestInstance
+from test_framework.comptool import TestManager, TestInstance, RejectResult
 from test_framework.mininode import *
 from test_framework.blocktools import *
 import logging
@@ -97,7 +97,7 @@ class InvalidBlockRequestTest(ComparisonTestFramework):
         assert(block2_orig.vtx != block2.vtx)
 
         self.tip = block2.sha256
-        yield TestInstance([[block2, False], [block2_orig, True]])
+        yield TestInstance([[block2, RejectResult(16,'bad-txns-duplicate')], [block2_orig, True]])
         height += 1
 
         '''
@@ -112,7 +112,7 @@ class InvalidBlockRequestTest(ComparisonTestFramework):
         block3.rehash()
         block3.solve()
 
-        yield TestInstance([[block3, False]])
+        yield TestInstance([[block3, RejectResult(16,'bad-cb-amount')]])
 
 
 if __name__ == '__main__':

qa/rpc-tests/invalidtxrequest.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python2
+#
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+#
+
+from test_framework.test_framework import ComparisonTestFramework
+from test_framework.util import *
+from test_framework.comptool import TestManager, TestInstance, RejectResult
+from test_framework.mininode import *
+from test_framework.blocktools import *
+import logging
+import copy
+import time
+
+
+'''
+In this test we connect to one node over p2p, and test tx requests.
+'''
+
+# Use the ComparisonTestFramework with 1 node: only use --testbinary.
+class InvalidTxRequestTest(ComparisonTestFramework):
+
+    ''' Can either run this test as 1 node with expected answers, or two and compare them. 
+        Change the "outcome" variable from each TestInstance object to only do the comparison. '''
+    def __init__(self):
+        self.num_nodes = 1
+
+    def run_test(self):
+        test = TestManager(self, self.options.tmpdir)
+        test.add_all_connections(self.nodes)
+        self.tip = None
+        self.block_time = None
+        NetworkThread().start() # Start up network handling in another thread
+        test.run()
+
+    def get_tests(self):
+        if self.tip is None:
+            self.tip = int ("0x" + self.nodes[0].getbestblockhash() + "L", 0)
+        self.block_time = int(time.time())+1
+
+        '''
+        Create a new block with an anyone-can-spend coinbase
+        '''
+        height = 1
+        block = create_block(self.tip, create_coinbase(height), self.block_time)
+        self.block_time += 1
+        block.solve()
+        # Save the coinbase for later
+        self.block1 = block
+        self.tip = block.sha256
+        height += 1
+        yield TestInstance([[block, True]])
+
+        '''
+        Now we need that block to mature so we can spend the coinbase.
+        '''
+        test = TestInstance(sync_every_block=False)
+        for i in xrange(100):
+            block = create_block(self.tip, create_coinbase(height), self.block_time)
+            block.solve()
+            self.tip = block.sha256
+            self.block_time += 1
+            test.blocks_and_transactions.append([block, True])
+            height += 1
+        yield test
+
+        # chr(100) is OP_NOTIF
+        # Transaction will be rejected with code 16 (REJECT_INVALID)
+        tx1 = create_transaction(self.block1.vtx[0], 0, chr(100), 50*100000000)
+        yield TestInstance([[tx1, RejectResult(16, 'mandatory-script-verify-flag-failed')]])
+
+        # TODO: test further transactions...
+
+if __name__ == '__main__':
+    InvalidTxRequestTest().main()

qa/rpc-tests/test_framework/comptool.py

@@ -41,6 +41,20 @@ def wait_until(predicate, attempts=float('inf'), timeout=float('inf')):
 
     return False
 
+class RejectResult(object):
+    '''
+    Outcome that expects rejection of a transaction or block.
+    '''
+    def __init__(self, code, reason=''):
+        self.code = code
+        self.reason = reason
+    def match(self, other):
+        if self.code != other.code:
+            return False
+        return other.reason.startswith(self.reason)
+    def __repr__(self):
+        return '%i:%s' % (self.code,self.reason or '*')
+
 class TestNode(NodeConnCB):
 
     def __init__(self, block_store, tx_store):
@@ -51,6 +65,8 @@ class TestNode(NodeConnCB):
         self.block_request_map = {}
         self.tx_store = tx_store
         self.tx_request_map = {}
+        self.block_reject_map = {}
+        self.tx_reject_map = {}
 
         # When the pingmap is non-empty we're waiting for 
         # a response
@@ -94,6 +110,12 @@ class TestNode(NodeConnCB):
         except KeyError:
             raise AssertionError("Got pong for unknown ping [%s]" % repr(message))
 
+    def on_reject(self, conn, message):
+        if message.message == 'tx':
+            self.tx_reject_map[message.data] = RejectResult(message.code, message.reason)
+        if message.message == 'block':
+            self.block_reject_map[message.data] = RejectResult(message.code, message.reason)
+
     def send_inv(self, obj):
         mtype = 2 if isinstance(obj, CBlock) else 1
         self.conn.send_message(msg_inv([CInv(mtype, obj.sha256)]))
@@ -243,6 +265,15 @@ class TestManager(object):
                 if outcome is None:
                     if c.cb.bestblockhash != self.connections[0].cb.bestblockhash:
                         return False
+                elif isinstance(outcome, RejectResult): # Check that block was rejected w/ code
+                    if c.cb.bestblockhash == blockhash:
+                        return False
+                    if blockhash not in c.cb.block_reject_map:
+                        print 'Block not in reject map: %064x' % (blockhash)
+                        return False
+                    if not outcome.match(c.cb.block_reject_map[blockhash]):
+                        print 'Block rejected with %s instead of expected %s: %064x' % (c.cb.block_reject_map[blockhash], outcome, blockhash)
+                        return False
                 elif ((c.cb.bestblockhash == blockhash) != outcome):
                     # print c.cb.bestblockhash, blockhash, outcome
                     return False
@@ -262,6 +293,15 @@ class TestManager(object):
                     if c.cb.lastInv != self.connections[0].cb.lastInv:
                         # print c.rpc.getrawmempool()
                         return False
+                elif isinstance(outcome, RejectResult): # Check that tx was rejected w/ code
+                    if txhash in c.cb.lastInv:
+                        return False
+                    if txhash not in c.cb.tx_reject_map:
+                        print 'Tx not in reject map: %064x' % (txhash)
+                        return False
+                    if not outcome.match(c.cb.tx_reject_map[txhash]):
+                        print 'Tx rejected with %s instead of expected %s: %064x' % (c.cb.tx_reject_map[txhash], outcome, txhash)
+                        return False
                 elif ((txhash in c.cb.lastInv) != outcome):
                     # print c.rpc.getrawmempool(), c.cb.lastInv
                     return False

src/main.cpp

@@ -4824,7 +4824,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
                 pfrom->id,
                 FormatStateMessage(state));
             if (state.GetRejectCode() < REJECT_INTERNAL) // Never send AcceptToMemoryPool's internal codes over P2P
-                pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
+                pfrom->PushMessage("reject", strCommand, (unsigned char)state.GetRejectCode(),
                                    state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
             if (nDoS > 0)
                 Misbehaving(pfrom->GetId(), nDoS);
@@ -4954,7 +4954,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         int nDoS;
         if (state.IsInvalid(nDoS)) {
             assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
-            pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
+            pfrom->PushMessage("reject", strCommand, (unsigned char)state.GetRejectCode(),
                                state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
             if (nDoS > 0) {
                 LOCK(cs_main);