74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
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* AutoPublicAddress.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "flow/Platform.h"
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#include <algorithm>
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#define BOOST_SYSTEM_NO_LIB
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#define BOOST_DATE_TIME_NO_LIB
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#define BOOST_REGEX_NO_LIB
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#include "boost/asio.hpp"
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#include "fdbclient/CoordinationInterface.h"
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// Determine public IP address by calling the first available coordinator.
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// If fail connecting all coordinators, throw bind_failed().
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IPAddress determinePublicIPAutomatically(ClusterConnectionString& ccs) {
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int size = ccs.coords.size() + ccs.hostnames.size();
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int index = 0;
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loop {
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try {
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using namespace boost::asio;
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io_service ioService;
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ip::udp::socket socket(ioService);
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NetworkAddress coordAddr;
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// Try coords first, because they don't need to be resolved.
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if (index < ccs.coords.size()) {
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coordAddr = ccs.coords[index];
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} else {
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Hostname& h = ccs.hostnames[index - ccs.coords.size()];
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Optional<NetworkAddress> resolvedAddr = h.resolveBlocking();
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if (!resolvedAddr.present()) {
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throw lookup_failed();
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}
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coordAddr = resolvedAddr.get();
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}
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const auto boostIp = coordAddr.ip.isV6() ? ip::address(ip::address_v6(coordAddr.ip.toV6()))
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: ip::address(ip::address_v4(coordAddr.ip.toV4()));
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ip::udp::endpoint endpoint(boostIp, coordAddr.port);
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socket.connect(endpoint);
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IPAddress ip = coordAddr.ip.isV6() ? IPAddress(socket.local_endpoint().address().to_v6().to_bytes())
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: IPAddress(socket.local_endpoint().address().to_v4().to_ulong());
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socket.close();
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return ip;
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} catch (...) {
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++index;
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if (index == size) {
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fprintf(stderr, "Error determining public address.\n");
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throw bind_failed();
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}
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}
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}
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}
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