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//
// Unit tests for denial-of-service detection/prevention code
//
#include <boost/assign/list_of.hpp> // for 'map_list_of()'
#include <boost/test/unit_test.hpp>
#include <boost/foreach.hpp>
#include "main.h"
#include "wallet.h"
#include "net.h"
#include "util.h"
using namespace std;
BOOST_AUTO_TEST_SUITE(DoS_tests)
BOOST_AUTO_TEST_CASE(DoS_banning)
{
CNode::ClearBanned();
CAddress addr1(0xa0b0c001);
CNode dummyNode1(INVALID_SOCKET, addr1, true);
dummyNode1.Misbehaving(100); // Should get banned
BOOST_CHECK(CNode::IsBanned(addr1.ip));
BOOST_CHECK(!CNode::IsBanned(addr1.ip|0x0000ff00)); // Different ip, not banned
CAddress addr2(0xa0b0c002);
CNode dummyNode2(INVALID_SOCKET, addr2, true);
dummyNode2.Misbehaving(50);
BOOST_CHECK(!CNode::IsBanned(addr2.ip)); // 2 not banned yet...
BOOST_CHECK(CNode::IsBanned(addr1.ip)); // ... but 1 still should be
dummyNode2.Misbehaving(50);
BOOST_CHECK(CNode::IsBanned(addr2.ip));
}
BOOST_AUTO_TEST_CASE(DoS_banscore)
{
CNode::ClearBanned();
mapArgs["-banscore"] = "111"; // because 11 is my favorite number
CAddress addr1(0xa0b0c001);
CNode dummyNode1(INVALID_SOCKET, addr1, true);
dummyNode1.Misbehaving(100);
BOOST_CHECK(!CNode::IsBanned(addr1.ip));
dummyNode1.Misbehaving(10);
BOOST_CHECK(!CNode::IsBanned(addr1.ip));
dummyNode1.Misbehaving(1);
BOOST_CHECK(CNode::IsBanned(addr1.ip));
mapArgs["-banscore"] = "100";
}
BOOST_AUTO_TEST_CASE(DoS_bantime)
{
CNode::ClearBanned();
int64 nStartTime = GetTime();
SetMockTime(nStartTime); // Overrides future calls to GetTime()
CAddress addr(0xa0b0c001);
CNode dummyNode(INVALID_SOCKET, addr, true);
dummyNode.Misbehaving(100);
BOOST_CHECK(CNode::IsBanned(addr.ip));
SetMockTime(nStartTime+60*60);
BOOST_CHECK(CNode::IsBanned(addr.ip));
SetMockTime(nStartTime+60*60*24+1);
BOOST_CHECK(!CNode::IsBanned(addr.ip));
}
static bool CheckNBits(unsigned int nbits1, int64 time1, unsigned int nbits2, int64 time2)
{
if (time1 > time2)
return CheckNBits(nbits2, time2, nbits1, time1);
int64 deltaTime = time2-time1;
CBigNum required;
required.SetCompact(ComputeMinWork(nbits1, deltaTime));
CBigNum have;
have.SetCompact(nbits2);
return (have <= required);
}
BOOST_AUTO_TEST_CASE(DoS_checknbits)
{
using namespace boost::assign; // for 'map_list_of()'
// Timestamps,nBits from the bitcoin blockchain.
// These are the block-chain checkpoint blocks
typedef std::map<int64, unsigned int> BlockData;
BlockData chainData =
map_list_of(1239852051,486604799)(1262749024,486594666)
(1279305360,469854461)(1280200847,469830746)(1281678674,469809688)
(1296207707,453179945)(1302624061,453036989)(1309640330,437004818)
(1313172719,436789733);
// Make sure CheckNBits considers every combination of block-chain-lock-in-points
// "sane":
BOOST_FOREACH(const BlockData::value_type& i, chainData)
{
BOOST_FOREACH(const BlockData::value_type& j, chainData)
{
BOOST_CHECK(CheckNBits(i.second, i.first, j.second, j.first));
}
}
// Test a couple of insane combinations:
BlockData::value_type firstcheck = *(chainData.begin());
BlockData::value_type lastcheck = *(chainData.rbegin());
// First checkpoint difficulty at or a while after the last checkpoint time should fail when
// compared to last checkpoint
BOOST_CHECK(!CheckNBits(firstcheck.second, lastcheck.first+60*10, lastcheck.second, lastcheck.first));
BOOST_CHECK(!CheckNBits(firstcheck.second, lastcheck.first+60*60*24*14, lastcheck.second, lastcheck.first));
// ... but OK if enough time passed for difficulty to adjust downward:
BOOST_CHECK(CheckNBits(firstcheck.second, lastcheck.first+60*60*24*365*4, lastcheck.second, lastcheck.first));
}
BOOST_AUTO_TEST_SUITE_END()
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