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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PLATFORM_IMPL_SOCKET_ADDRESS_POSIX_H_
#define PLATFORM_IMPL_SOCKET_ADDRESS_POSIX_H_
#include <fcntl.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <string>
#include "platform/base/ip_address.h"
namespace openscreen {
class SocketAddressPosix {
public:
explicit SocketAddressPosix(const struct sockaddr& address);
explicit SocketAddressPosix(const IPEndpoint& endpoint);
SocketAddressPosix(const SocketAddressPosix&) = default;
SocketAddressPosix(SocketAddressPosix&&) noexcept = default;
SocketAddressPosix& operator=(const SocketAddressPosix&) = default;
SocketAddressPosix& operator=(SocketAddressPosix&&) noexcept = default;
struct sockaddr* address();
const struct sockaddr* address() const;
socklen_t size() const;
IPAddress::Version version() const { return endpoint_.address.version(); }
IPEndpoint endpoint() const { return endpoint_; }
// Recomputes |endpoint_| if |internal_address_| is written to directly, e.g.
// by a system call.
void RecomputeEndpoint();
private:
void RecomputeEndpoint(IPAddress::Version version);
// The way the sockaddr_* family works in POSIX is pretty unintuitive. The
// sockaddr_in and sockaddr_in6 structs can be reinterpreted as type
// sockaddr, however they don't have a common parent--the types are unrelated.
// Our solution for this is to wrap sockaddr_in* in a union, so that our code
// can be simplified since most platform APIs just take a sockaddr.
union SocketAddressIn {
struct sockaddr_in v4;
struct sockaddr_in6 v6;
};
SocketAddressIn internal_address_;
IPEndpoint endpoint_;
};
} // namespace openscreen
#endif // PLATFORM_IMPL_SOCKET_ADDRESS_POSIX_H_
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