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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/s/client/sharding_network_connection_hook.h"
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/server_options.h"
#include "mongo/db/wire_version.h"
#include "mongo/executor/remote_command_request.h"
#include "mongo/executor/remote_command_response.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
#include "mongo/util/net/hostandport.h"
#include "mongo/util/str.h"
namespace mongo {
Status ShardingNetworkConnectionHook::validateHost(
const HostAndPort& remoteHost,
const BSONObj&,
const executor::RemoteCommandResponse& isMasterReply) {
return validateHostImpl(remoteHost, isMasterReply);
}
Status ShardingNetworkConnectionHook::validateHostImpl(
const HostAndPort& remoteHost, const executor::RemoteCommandResponse& isMasterReply) {
auto shard =
Grid::get(getGlobalServiceContext())->shardRegistry()->getShardForHostNoReload(remoteHost);
if (!shard) {
return {ErrorCodes::ShardNotFound,
str::stream() << "No shard found for host: " << remoteHost.toString()};
}
long long configServerModeNumber;
auto status = bsonExtractIntegerField(isMasterReply.data, "configsvr", &configServerModeNumber);
switch (status.code()) {
case ErrorCodes::OK: {
// The ismaster response indicates remoteHost is a config server.
if (!shard->isConfig()) {
return {ErrorCodes::InvalidOptions,
str::stream() << "Surprised to discover that " << remoteHost.toString()
<< " believes it is a config server"};
}
return Status::OK();
}
case ErrorCodes::NoSuchKey: {
// The ismaster response indicates that remoteHost is not a config server, or that
// the config server is running a version prior to the 3.1 development series.
if (!shard->isConfig()) {
return Status::OK();
}
return {ErrorCodes::InvalidOptions,
str::stream() << "Surprised to discover that " << remoteHost.toString()
<< " does not believe it is a config server"};
}
default:
// The ismaster response was malformed.
return status;
}
}
StatusWith<boost::optional<executor::RemoteCommandRequest>>
ShardingNetworkConnectionHook::makeRequest(const HostAndPort& remoteHost) {
return {boost::none};
}
Status ShardingNetworkConnectionHook::handleReply(const HostAndPort& remoteHost,
executor::RemoteCommandResponse&& response) {
MONGO_UNREACHABLE;
}
} // namespace mongo
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