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/*
* File: fix/network.hpp
* Purpose: Financial Information Exchange in C++
* Author: Amlal El Mahrouss (founder@snu.systems)
* Copyright 2025, Amlal El Mahrouss and SNU Systems Corp.
*/
#ifndef _SNU_FIX_NETWORK_HPP
#define _SNU_FIX_NETWORK_HPP
#include <arpa/inet.h>
#include <sys/socket.h>
#include <utility>
#include <cstddef>
#define SNU_MODEM : protected snu::fix::basic_delivery_modem
namespace snu::fix
{
class basic_delivery_modem;
typedef int32_t delivery_socket_type;
/// @brief a delivery modem is a container which establishes a comm. channel between the FIX session and application.
class basic_delivery_modem
{
public:
explicit basic_delivery_modem() = default;
virtual ~basic_delivery_modem() = default;
basic_delivery_modem& operator=(const basic_delivery_modem&) = default;
basic_delivery_modem(const basic_delivery_modem&) = default;
public:
static constexpr auto local_address = "127.0.0.1";
static constexpr auto backlog_count = 18U;
public:
delivery_socket_type fd_{};
template <typename T>
bool receive(T& out, std::size_t len) noexcept
{
static_assert(std::is_pointer<T>::value, "T is not a pointer!");
if (!out)
return false;
if (!len)
return false;
auto ret = ::recv(fd_, out, len, MSG_WAITALL);
return ret > 0;
}
template <typename T>
bool transmit(T& out, std::size_t len) noexcept
{
static_assert(std::is_pointer<T>::value, "T is not a pointer!");
if (!out)
return false;
if (!len)
return false;
auto ret = ::send(fd_, out, len, 0);
return ret > 0;
}
template <int32_t AF, int32_t Kind, int32_t IPProto, int32_t Port>
bool construct(const char* addr = basic_delivery_modem::local_address, const bool& is_server = false) noexcept
{
static_assert(AF != 0, "AF is zero");
static_assert(Kind != 0, "Kind is zero");
static_assert(IPProto != 0, "IPProto is zero");
fd_ = ::socket(AF, Kind, IPProto);
if (fd_ < 1)
return false;
struct sockaddr_in addr_
{
};
addr_.sin_addr.s_addr = ::inet_addr(addr);
addr_.sin_port = Port;
if (!is_server)
{
auto ret = ::connect(fd_, (struct sockaddr*)&addr_, sizeof(decltype(addr_)));
return ret == 0;
}
::listen(fd_, basic_delivery_modem::backlog_count);
return true;
}
bool destroy() noexcept
{
if (!fd_)
return false;
::shutdown(fd_, SHUT_RDWR);
fd_ = 0U;
return true;
}
};
} // namespace snu::fix
#endif // ifndef _SNU_FIX_NETWORK_HPP
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