| /* |
| * 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. |
| */ |
| |
| #include "DnsTlsServer.h" |
| |
| #include <algorithm> |
| |
| namespace { |
| |
| // Returns a tuple of references to the elements of a. |
| auto make_tie(const sockaddr_in& a) { |
| return std::tie(a.sin_port, a.sin_addr.s_addr); |
| } |
| |
| // Returns a tuple of references to the elements of a. |
| auto make_tie(const sockaddr_in6& a) { |
| // Skip flowinfo, which is not relevant. |
| return std::tie( |
| a.sin6_port, |
| a.sin6_addr, |
| a.sin6_scope_id |
| ); |
| } |
| |
| } // namespace |
| |
| // These binary operators make sockaddr_storage comparable. They need to be |
| // in the global namespace so that the std::tuple < and == operators can see them. |
| static bool operator <(const in6_addr& x, const in6_addr& y) { |
| return std::lexicographical_compare( |
| std::begin(x.s6_addr), std::end(x.s6_addr), |
| std::begin(y.s6_addr), std::end(y.s6_addr)); |
| } |
| |
| static bool operator ==(const in6_addr& x, const in6_addr& y) { |
| return std::equal( |
| std::begin(x.s6_addr), std::end(x.s6_addr), |
| std::begin(y.s6_addr), std::end(y.s6_addr)); |
| } |
| |
| static bool operator <(const sockaddr_storage& x, const sockaddr_storage& y) { |
| if (x.ss_family != y.ss_family) { |
| return x.ss_family < y.ss_family; |
| } |
| // Same address family. |
| if (x.ss_family == AF_INET) { |
| const sockaddr_in& x_sin = reinterpret_cast<const sockaddr_in&>(x); |
| const sockaddr_in& y_sin = reinterpret_cast<const sockaddr_in&>(y); |
| return make_tie(x_sin) < make_tie(y_sin); |
| } else if (x.ss_family == AF_INET6) { |
| const sockaddr_in6& x_sin6 = reinterpret_cast<const sockaddr_in6&>(x); |
| const sockaddr_in6& y_sin6 = reinterpret_cast<const sockaddr_in6&>(y); |
| return make_tie(x_sin6) < make_tie(y_sin6); |
| } |
| return false; // Unknown address type. This is an error. |
| } |
| |
| static bool operator ==(const sockaddr_storage& x, const sockaddr_storage& y) { |
| if (x.ss_family != y.ss_family) { |
| return false; |
| } |
| // Same address family. |
| if (x.ss_family == AF_INET) { |
| const sockaddr_in& x_sin = reinterpret_cast<const sockaddr_in&>(x); |
| const sockaddr_in& y_sin = reinterpret_cast<const sockaddr_in&>(y); |
| return make_tie(x_sin) == make_tie(y_sin); |
| } else if (x.ss_family == AF_INET6) { |
| const sockaddr_in6& x_sin6 = reinterpret_cast<const sockaddr_in6&>(x); |
| const sockaddr_in6& y_sin6 = reinterpret_cast<const sockaddr_in6&>(y); |
| return make_tie(x_sin6) == make_tie(y_sin6); |
| } |
| return false; // Unknown address type. This is an error. |
| } |
| |
| namespace android { |
| namespace net { |
| |
| // This comparison ignores ports and certificates. |
| bool AddressComparator::operator() (const DnsTlsServer& x, const DnsTlsServer& y) const { |
| if (x.ss.ss_family != y.ss.ss_family) { |
| return x.ss.ss_family < y.ss.ss_family; |
| } |
| // Same address family. |
| if (x.ss.ss_family == AF_INET) { |
| const sockaddr_in& x_sin = reinterpret_cast<const sockaddr_in&>(x.ss); |
| const sockaddr_in& y_sin = reinterpret_cast<const sockaddr_in&>(y.ss); |
| return x_sin.sin_addr.s_addr < y_sin.sin_addr.s_addr; |
| } else if (x.ss.ss_family == AF_INET6) { |
| const sockaddr_in6& x_sin6 = reinterpret_cast<const sockaddr_in6&>(x.ss); |
| const sockaddr_in6& y_sin6 = reinterpret_cast<const sockaddr_in6&>(y.ss); |
| return std::tie(x_sin6.sin6_addr, x_sin6.sin6_scope_id) < |
| std::tie(y_sin6.sin6_addr, y_sin6.sin6_scope_id); |
| } |
| return false; // Unknown address type. This is an error. |
| } |
| |
| // Returns a tuple of references to the elements of s. |
| auto make_tie(const DnsTlsServer& s) { |
| return std::tie( |
| s.ss, |
| s.name, |
| s.protocol |
| ); |
| } |
| |
| bool DnsTlsServer::operator <(const DnsTlsServer& other) const { |
| return make_tie(*this) < make_tie(other); |
| } |
| |
| bool DnsTlsServer::operator ==(const DnsTlsServer& other) const { |
| return make_tie(*this) == make_tie(other); |
| } |
| |
| bool DnsTlsServer::wasExplicitlyConfigured() const { |
| return !name.empty(); |
| } |
| |
| } // namespace net |
| } // namespace android |