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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _DNS_DNSTLSSERVER_H
#define _DNS_DNSTLSSERVER_H
#include <set>
#include <string>
#include <vector>
#include <netinet/in.h>
#include <netd_resolv/params.h>
namespace android {
namespace net {
// DnsTlsServer represents a recursive resolver that supports, or may support, a
// secure protocol.
struct DnsTlsServer {
// Default constructor.
DnsTlsServer() {}
// Allow sockaddr_storage to be promoted to DnsTlsServer automatically.
DnsTlsServer(const sockaddr_storage& ss) : ss(ss) {}
enum class Response : uint8_t { success, network_error, limit_error, internal_error };
struct Result {
Response code;
std::vector<uint8_t> response;
};
// The server location, including IP and port.
sockaddr_storage ss = {};
// A set of SHA256 public key fingerprints. If this set is nonempty, the server
// must present a self-consistent certificate chain that contains a certificate
// whose public key matches one of these fingerprints. Otherwise, the client will
// terminate the connection.
std::set<std::vector<uint8_t>> fingerprints;
// The server's hostname. If this string is nonempty, the server must present a
// certificate that indicates this name and has a valid chain to a trusted root CA.
std::string name;
// Placeholder. More protocols might be defined in the future.
int protocol = IPPROTO_TCP;
// Exact comparison of DnsTlsServer objects
bool operator<(const DnsTlsServer& other) const;
bool operator==(const DnsTlsServer& other) const;
bool wasExplicitlyConfigured() const;
};
// This comparison only checks the IP address. It ignores ports, names, and fingerprints.
struct AddressComparator {
bool operator()(const DnsTlsServer& x, const DnsTlsServer& y) const;
};
} // namespace net
} // namespace android
#endif // _DNS_DNSTLSSERVER_H