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/**
* Copyright (C) 2020-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.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kNetwork
#include "mongo/db/commands.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/repl_set_test_egress_gen.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/executor/network_interface_factory.h"
#include "mongo/executor/network_interface_tl.h"
#include "mongo/logv2/log.h"
#include "mongo/util/duration.h"
#include "mongo/util/net/hostandport.h"
namespace mongo {
namespace repl {
namespace {
HostAndPort selectTarget(OperationContext* opCtx) {
auto members = ReplicationCoordinator::get(opCtx)->getMemberData();
for (const auto& member : members) {
if (member.up() && !member.isSelf()) {
return member.getHostAndPort();
}
}
uasserted(ErrorCodes::InternalError, "No viable replica set members to conenct to");
}
HostAndPort validateTarget(OperationContext* opCtx, StringData targetStr) {
auto members = ReplicationCoordinator::get(opCtx)->getMemberData();
auto target = HostAndPort::parseThrowing(targetStr);
for (const auto& member : members) {
if (target == member.getHostAndPort()) {
if (member.isSelf()) {
LOGV2_WARNING(4697200,
"Using replSetTestEgress to connect to self",
"target"_attr = targetStr);
} else if (!member.up()) {
LOGV2_WARNING(4697201,
"replSetTestEgress connecting to node which appears down",
"target"_attr = targetStr);
}
return target;
}
}
uasserted(ErrorCodes::BadValue, str::stream() << targetStr << " is not a replica set member");
}
constexpr auto kReplSetTestEgress = "replSetTestEgress"_sd;
auto getNetworkInterface() {
static auto uniqueNI = ([] {
auto ret = executor::makeNetworkInterface(kReplSetTestEgress.toString());
ret->startup();
return ret;
})();
return uniqueNI.get();
}
const Status kDisconnectStatus(ErrorCodes::ClientDisconnect, "Invalidating temporary connection");
class CmdReplSetTestEgress final : public TypedCommand<CmdReplSetTestEgress> {
public:
using Request = ReplSetTestEgress;
using Reply = ReplSetTestEgressReply;
class Invocation final : public InvocationBase {
public:
using InvocationBase::InvocationBase;
Reply typedRun(OperationContext* opCtx) {
const auto& cmd = request();
HostAndPort target;
if (auto optTarget = cmd.getTarget()) {
target = validateTarget(opCtx, optTarget.get());
} else {
target = selectTarget(opCtx);
}
Seconds timeout(cmd.getTimeoutSecs());
// ConnectionPool wants very much to have at least one idle connection
// at the ready so that we never have to wait for an outgoing request.
// We must thwart that.
auto net = getNetworkInterface();
LOGV2_DEBUG(
4697203, 4, "Dropping any existing connections", "target"_attr = target.toString());
net->dropConnections(target);
LOGV2_DEBUG(4697204,
4,
"Opening test egress connection",
"target"_attr = target.toString(),
"timeout"_attr = timeout);
net->testEgress(
target, transport::ConnectSSLMode::kGlobalSSLMode, timeout, kDisconnectStatus);
Reply reply;
reply.setTarget(target.toString());
return reply;
}
private:
bool supportsWriteConcern() const final {
return false;
}
void doCheckAuthorization(OperationContext*) const final {}
NamespaceString ns() const final {
return NamespaceString(request().getDbName(), "");
}
};
bool adminOnly() const final {
return true;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const final {
return AllowedOnSecondary::kAlways;
}
};
MONGO_REGISTER_TEST_COMMAND(CmdReplSetTestEgress);
} // namespace
} // namespace repl
} // namespace mongo
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