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// Copyright (c) 2020-2022, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "net/resolve.h"
#include <boost/utility/string_ref.hpp>
#include "common/dns_utils.h"
#include "common/expect.h"
#include "net/error.h"
namespace net
{
namespace dnssec
{
expect<service_response> resolve_hostname(const std::string& addr, const std::string& tlsa_port)
{
// use basic (blocking) unbound for now, possibly refactor later
tools::DNSResolver& resolver = tools::DNSResolver::instance();
bool dnssec_available = false;
bool dnssec_valid = false;
std::vector<std::string> ip_records = resolver.get_ipv4(addr, dnssec_available, dnssec_valid);
if (dnssec_available && !dnssec_valid)
return {net::error::bogus_dnssec};
if (ip_records.empty())
{
ip_records = resolver.get_ipv6(addr, dnssec_available, dnssec_valid);
if (dnssec_available && !dnssec_valid)
return {net::error::bogus_dnssec};
if (ip_records.empty())
return {net::error::dns_query_failure};
}
std::vector<std::string> tlsa{};
if (dnssec_available && !tlsa_port.empty())
{
tlsa = resolver.get_tlsa_tcp_record(addr, tlsa_port, dnssec_available, dnssec_valid);
if (!dnssec_valid)
return {net::error::bogus_dnssec};
}
return {{std::move(ip_records), std::move(tlsa)}};
}
} // dnssec
} // net
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