tdlight/tdutils/td/utils/port/UdpSocketFd.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/port/config.h"
#include "td/utils/buffer.h"
#include "td/utils/optional.h"
#include "td/utils/port/detail/NativeFd.h"
#include "td/utils/port/detail/PollableFd.h"
#include "td/utils/port/IPAddress.h"
#include "td/utils/Slice.h"
#include "td/utils/Span.h"
#include "td/utils/Status.h"
#include <memory>
namespace td {
// Udp and errors
namespace detail {
class UdpSocketFdImpl;
class UdpSocketFdImplDeleter {
public:
void operator()(UdpSocketFdImpl *impl);
};
} // namespace detail
struct UdpMessage {
IPAddress address;
BufferSlice data;
Status error;
};
class UdpSocketFd {
public:
UdpSocketFd();
UdpSocketFd(UdpSocketFd &&) noexcept;
UdpSocketFd &operator=(UdpSocketFd &&) noexcept;
~UdpSocketFd();
UdpSocketFd(const UdpSocketFd &) = delete;
UdpSocketFd &operator=(const UdpSocketFd &) = delete;
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Result<uint32> maximize_snd_buffer(uint32 max_size = 0);
Result<uint32> maximize_rcv_buffer(uint32 max_size = 0);
static Result<UdpSocketFd> open(const IPAddress &address) TD_WARN_UNUSED_RESULT;
PollableFdInfo &get_poll_info();
const PollableFdInfo &get_poll_info() const;
const NativeFd &get_native_fd() const;
void close();
bool empty() const;
static bool is_critical_read_error(const Status &status);
#if TD_PORT_POSIX
struct OutboundMessage {
const IPAddress *to;
Slice data;
};
struct InboundMessage {
IPAddress *from;
MutableSlice data;
Status *error;
};
Status send_message(const OutboundMessage &message, bool &is_sent) TD_WARN_UNUSED_RESULT;
Status receive_message(InboundMessage &message, bool &is_received) TD_WARN_UNUSED_RESULT;
Status send_messages(Span<OutboundMessage> messages, size_t &count) TD_WARN_UNUSED_RESULT;
Status receive_messages(MutableSpan<InboundMessage> messages, size_t &count) TD_WARN_UNUSED_RESULT;
#elif TD_PORT_WINDOWS
Result<optional<UdpMessage> > receive();
void send(UdpMessage message);
Status flush_send();
#endif
private:
static constexpr uint32 DEFAULT_UDP_MAX_SND_BUFFER_SIZE = (1 << 24);
static constexpr uint32 DEFAULT_UDP_MAX_RCV_BUFFER_SIZE = (1 << 24);
std::unique_ptr<detail::UdpSocketFdImpl, detail::UdpSocketFdImplDeleter> impl_;
explicit UdpSocketFd(unique_ptr<detail::UdpSocketFdImpl> impl);
};
} // namespace td