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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/base/status.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/wire_version.h"
#include "mongo/rpc/protocol.h"
#include "mongo/unittest/unittest.h"
namespace {
using mongo::WireVersion;
using namespace mongo::rpc;
using mongo::unittest::assertGet;
using mongo::BSONObj;
// Checks if negotiation of the first to protocol sets results in the 'proto'
const auto assert_negotiated = [](ProtocolSet fst, ProtocolSet snd, Protocol proto) {
auto negotiated = negotiate(fst, snd);
ASSERT_TRUE(negotiated.isOK());
ASSERT_TRUE(negotiated.getValue() == proto);
};
TEST(Protocol, SuccessfulNegotiation) {
assert_negotiated(supports::kAll, supports::kAll, Protocol::kOpMsg);
assert_negotiated(supports::kAll, supports::kOpMsgOnly, Protocol::kOpMsg);
assert_negotiated(supports::kAll, supports::kOpCommandOnly, Protocol::kOpCommandV1);
assert_negotiated(supports::kAll, supports::kOpQueryOnly, Protocol::kOpQuery);
}
// Checks that negotiation fails
const auto assert_not_negotiated = [](ProtocolSet fst, ProtocolSet snd) {
auto proto = negotiate(fst, snd);
ASSERT_TRUE(!proto.isOK());
ASSERT_TRUE(proto.getStatus().code() == mongo::ErrorCodes::RPCProtocolNegotiationFailed);
};
TEST(Protocol, FailedNegotiation) {
assert_not_negotiated(supports::kOpQueryOnly, supports::kOpCommandOnly);
assert_not_negotiated(supports::kAll, supports::kNone);
assert_not_negotiated(supports::kOpQueryOnly, supports::kNone);
assert_not_negotiated(supports::kOpCommandOnly, supports::kNone);
}
TEST(Protocol, parseProtocolSetFromIsMasterReply) {
{
// MongoDB 3.8
auto mongod38 =
BSON("maxWireVersion" << static_cast<int>(WireVersion::REPLICA_SET_TRANSACTIONS)
<< "minWireVersion"
<< static_cast<int>(WireVersion::RELEASE_2_4_AND_BEFORE));
ASSERT_EQ(assertGet(parseProtocolSetFromIsMasterReply(mongod38)).protocolSet,
supports::kAll);
}
{
// MongoDB 3.6
auto mongod36 =
BSON("maxWireVersion" << static_cast<int>(WireVersion::SUPPORTS_OP_MSG) //
<< "minWireVersion"
<< static_cast<int>(WireVersion::RELEASE_2_4_AND_BEFORE));
ASSERT_EQ(assertGet(parseProtocolSetFromIsMasterReply(mongod36)).protocolSet,
supports::kAll);
}
{
// MongoDB 3.2 (mongod)
auto mongod32 =
BSON("maxWireVersion" << static_cast<int>(WireVersion::COMMANDS_ACCEPT_WRITE_CONCERN)
<< "minWireVersion"
<< static_cast<int>(WireVersion::RELEASE_2_4_AND_BEFORE));
ASSERT_EQ(assertGet(parseProtocolSetFromIsMasterReply(mongod32)).protocolSet,
supports::kOpQueryOnly | supports::kOpCommandOnly);
}
{
// MongoDB 3.2 (mongos)
auto mongos32 =
BSON("maxWireVersion" << static_cast<int>(WireVersion::COMMANDS_ACCEPT_WRITE_CONCERN)
<< "minWireVersion"
<< static_cast<int>(WireVersion::RELEASE_2_4_AND_BEFORE)
<< "msg"
<< "isdbgrid");
ASSERT_EQ(assertGet(parseProtocolSetFromIsMasterReply(mongos32)).protocolSet,
supports::kOpQueryOnly);
}
{
// MongoDB 3.0 (mongod)
auto mongod30 = BSON(
"maxWireVersion" << static_cast<int>(WireVersion::RELEASE_2_7_7) << "minWireVersion"
<< static_cast<int>(WireVersion::RELEASE_2_4_AND_BEFORE));
ASSERT_EQ(assertGet(parseProtocolSetFromIsMasterReply(mongod30)).protocolSet,
supports::kOpQueryOnly);
}
{
auto mongod24 = BSONObj();
ASSERT_EQ(assertGet(parseProtocolSetFromIsMasterReply(mongod24)).protocolSet,
supports::kOpQueryOnly);
}
}
#define VALIDATE_WIRE_VERSION(macro, clientMin, clientMax, serverMin, serverMax) \
do { \
auto msg = BSON("minWireVersion" << static_cast<int>(serverMin) << "maxWireVersion" \
<< static_cast<int>(serverMax)); \
auto swReply = parseProtocolSetFromIsMasterReply(msg); \
ASSERT_OK(swReply.getStatus()); \
macro(validateWireVersion({clientMin, clientMax}, swReply.getValue().version)); \
} while (0);
TEST(Protocol, validateWireVersion) {
/*
* Test communication with a MongoD latest binary server with downgraded FCV.
*/
// MongoD 'latest' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION);
// MongoD 'latest' client -> MongoD downgraded 'last-stable' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 2,
WireVersion::LATEST_WIRE_VERSION - 1);
// MongoD 'latest' client -> MongoD upgraded 'last-stable' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1);
// MongoD downgraded 'last-stable' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 2,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION);
// MongoD upgraded 'last-stable' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION);
// MongoS 'latest' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION);
// MongoS 'last-stable' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION);
/*
* Test communication with a MongoD latest binary server with upgraded FCV.
*/
// MongoD 'latest' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION);
// MongoD 'latest' client -> MongoD downgraded 'last-stable' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 2,
WireVersion::LATEST_WIRE_VERSION - 1);
// MongoD 'latest' client -> MongoD upgraded 'last-stable' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1);
// MongoD downgraded 'last-stable' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION - 2,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION);
// MongoD upgraded 'last-stable' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION);
// MongoS 'latest' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION);
// MongoS 'last-stable' client -> MongoD 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION);
/*
* Test communication between MongoD latest binary servers where one has upgraded FCV and the
* other downgraded FCV.
*/
// MongoD upgraded 'latest' client -> MongoD downgraded 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION);
// MongoD downgraded 'latest' client -> MongoD upgraded 'latest' server
VALIDATE_WIRE_VERSION(ASSERT_OK,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION);
/*
* Test that it is disallowed for MongoS to communicate with a lower binary server, regardless
* of FCV.
*/
// MongoS 'latest' -> MongoD downgraded 'last-stable' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 2,
WireVersion::LATEST_WIRE_VERSION - 1);
// MongoS 'latest' -> MongoD upgraded 'last-stable' server
VALIDATE_WIRE_VERSION(ASSERT_NOT_OK,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION,
WireVersion::LATEST_WIRE_VERSION - 1,
WireVersion::LATEST_WIRE_VERSION - 1);
}
// A mongos is unable to communicate with a fully upgraded cluster with a higher wire version.
TEST(Protocol, validateWireVersionFailsForUpgradedServerNode) {
// Server is fully upgraded higher than the latest wire version.
auto msg =
BSON("minWireVersion" << static_cast<int>(WireVersion::FUTURE_WIRE_VERSION_FOR_TESTING)
<< "maxWireVersion"
<< static_cast<int>(WireVersion::FUTURE_WIRE_VERSION_FOR_TESTING));
auto swReply = parseProtocolSetFromIsMasterReply(msg);
ASSERT_OK(swReply.getStatus());
// The client (this mongos server) only has latest wire version.
ASSERT_EQUALS(
mongo::ErrorCodes::IncompatibleWithUpgradedServer,
validateWireVersion({WireVersion::LATEST_WIRE_VERSION, WireVersion::LATEST_WIRE_VERSION},
swReply.getValue().version)
.code());
}
} // namespace
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