/*
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* Copyright (C) 2017 The Android Open Source Project
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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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#ifndef _DNS_DNSTLSSERVER_H
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#define _DNS_DNSTLSSERVER_H
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#include <set>
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#include <string>
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#include <vector>
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#include <netinet/in.h>
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#include <netd_resolv/params.h>
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namespace android {
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namespace net {
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// DnsTlsServer represents a recursive resolver that supports, or may support, a
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// secure protocol.
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struct DnsTlsServer {
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// Default constructor.
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DnsTlsServer() {}
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// Allow sockaddr_storage to be promoted to DnsTlsServer automatically.
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DnsTlsServer(const sockaddr_storage& ss) : ss(ss) {}
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enum class Response : uint8_t { success, network_error, limit_error, internal_error };
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struct Result {
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Response code;
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std::vector<uint8_t> response;
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};
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// The server location, including IP and port.
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sockaddr_storage ss = {};
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// A set of SHA256 public key fingerprints. If this set is nonempty, the server
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// must present a self-consistent certificate chain that contains a certificate
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// whose public key matches one of these fingerprints. Otherwise, the client will
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// terminate the connection.
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std::set<std::vector<uint8_t>> fingerprints;
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// The server's hostname. If this string is nonempty, the server must present a
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// certificate that indicates this name and has a valid chain to a trusted root CA.
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std::string name;
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// Placeholder. More protocols might be defined in the future.
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int protocol = IPPROTO_TCP;
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// Exact comparison of DnsTlsServer objects
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bool operator<(const DnsTlsServer& other) const;
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bool operator==(const DnsTlsServer& other) const;
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bool wasExplicitlyConfigured() const;
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};
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// This comparison only checks the IP address. It ignores ports, names, and fingerprints.
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struct AddressComparator {
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bool operator()(const DnsTlsServer& x, const DnsTlsServer& y) const;
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};
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} // namespace net
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} // namespace android
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#endif // _DNS_DNSTLSSERVER_H
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