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construct/include/ircd/net/socket.h

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// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_NET_SOCKET_H
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// This file is not included with the IRCd standard include stack because
// it requires symbols we can't forward declare without boost headers. It
// is part of the <ircd/asio.h> stack which can be included in your
// definition file if you need low level access to this socket API.
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namespace ircd::net
{
extern conf::item<std::string> ssl_curve_list;
extern conf::item<std::string> ssl_cipher_list;
extern conf::item<std::string> ssl_cipher_blacklist;
extern asio::ssl::context sslv23_client;
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}
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/// Internal socket interface
///
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struct ircd::net::socket
:std::enable_shared_from_this<ircd::net::socket>
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{
struct io;
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struct stat;
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struct xfer;
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using endpoint = ip::tcp::endpoint;
using wait_type = ip::tcp::socket::wait_type;
using message_flags = asio::socket_base::message_flags;
using handshake_type = asio::ssl::stream<ip::tcp::socket>::handshake_type;
using ec_handler = std::function<void (const error_code &)>;
using eptr_handler = std::function<void (std::exception_ptr)>;
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struct stat
{
size_t bytes {0};
size_t calls {0};
};
static uint64_t count; // monotonic
static uint64_t instances; // current socket count
static stats::item total_bytes_in;
static stats::item total_bytes_out;
static stats::item total_calls_in;
static stats::item total_calls_out;
uint64_t id {++count};
ip::tcp::socket sd;
asio::ssl::stream<ip::tcp::socket &> ssl;
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stat in, out;
deadline_timer timer;
uint64_t timer_sem[2] {0}; // handler, sender
bool timer_set {false}; // boolean lockout
bool timedout {false};
bool fini {false};
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void call_user(const eptr_handler &, const error_code &) noexcept;
void call_user(const ec_handler &, const error_code &) noexcept;
bool handle_verify(bool, asio::ssl::verify_context &, const open_opts &) noexcept;
void handle_disconnect(std::shared_ptr<socket>, eptr_handler, error_code) noexcept;
void handle_handshake(std::weak_ptr<socket>, eptr_handler, error_code) noexcept;
void handle_connect(std::weak_ptr<socket>, const open_opts &, eptr_handler, error_code) noexcept;
void handle_timeout(std::weak_ptr<socket>, ec_handler, error_code) noexcept;
void handle_ready(std::weak_ptr<socket>, ready, ec_handler, error_code) noexcept;
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public:
operator const ip::tcp::socket &() const { return sd; }
operator ip::tcp::socket &() { return sd; }
operator const SSL &() const;
operator SSL &();
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endpoint remote() const; // getpeername(); throws if not conn
endpoint local() const; // getsockname(); throws if not conn/bound
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// Timer for this socket
void set_timeout(const milliseconds &, ec_handler);
void set_timeout(const milliseconds &);
milliseconds cancel_timeout() noexcept;
// low level write suite
template<class iov> size_t write_one(iov&&); // non-blocking
template<class iov> size_t write_any(iov&&); // non-blocking
template<class iov> size_t write_few(iov&&); // yielding
template<class iov> size_t write_all(iov&&); // yielding
// low level read suite
template<class iov> size_t read_one(iov&&); // non-blocking
template<class iov> size_t read_any(iov&&); // non-blocking
template<class iov> size_t read_few(iov&&); // yielding
template<class iov> size_t read_all(iov&&); // yielding
// low level check suite
error_code check(std::nothrow_t, const ready &) noexcept;
// low level wait suite
void wait(const wait_opts &);
void wait(const wait_opts &, wait_callback_ec);
void wait(const wait_opts &, wait_callback_eptr);
template<class... args> auto operator()(args&&...); // Alias to wait()
void disconnect(const close_opts &, eptr_handler);
void handshake(const open_opts &, eptr_handler);
void connect(const endpoint &, const open_opts &, eptr_handler);
bool cancel() noexcept;
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socket(asio::ssl::context & = sslv23_client);
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// Socket cannot be copied or moved; must be constructed as shared ptr
socket(socket &&) = delete;
socket(const socket &) = delete;
socket &operator=(socket &&) = delete;
socket &operator=(const socket &) = delete;
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~socket() noexcept;
};
template<class... args>
auto
ircd::net::socket::operator()(args&&... a)
{
return this->wait(std::forward<args>(a)...);
}