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/*
* Copyright 2015-2021 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SOCKET_ERROR_HXX
#define SOCKET_ERROR_HXX
#include "util/Compiler.h"
#include "system/Error.hxx"
#ifdef _WIN32
#include <winsock2.h>
typedef DWORD socket_error_t;
#else
#include <cerrno>
typedef int socket_error_t;
#endif
gcc_pure
static inline socket_error_t
GetSocketError() noexcept
{
#ifdef _WIN32
return WSAGetLastError();
#else
return errno;
#endif
}
constexpr bool
IsSocketErrorInProgress(socket_error_t code) noexcept
{
#ifdef _WIN32
return code == WSAEINPROGRESS;
#else
return code == EINPROGRESS;
#endif
}
constexpr bool
IsSocketErrorWouldBlock(socket_error_t code) noexcept
{
#ifdef _WIN32
return code == WSAEWOULDBLOCK;
#else
return code == EWOULDBLOCK;
#endif
}
constexpr bool
IsSocketErrorConnectWouldBlock(socket_error_t code) noexcept
{
#if defined(_WIN32) || defined(__linux__)
/* on Windows, WSAEINPROGRESS is for blocking sockets and
WSAEWOULDBLOCK for non-blocking sockets */
/* on Linux, EAGAIN==EWOULDBLOCK is for local sockets and
EINPROGRESS is for all other sockets */
return IsSocketErrorInProgress(code) || IsSocketErrorWouldBlock(code);
#else
/* on all other operating systems, there's just EINPROGRESS */
return IsSocketErrorInProgress(code);
#endif
}
constexpr bool
IsSocketErrorSendWouldBlock(socket_error_t code) noexcept
{
#ifdef _WIN32
/* on Windows, WSAEINPROGRESS is for blocking sockets and
WSAEWOULDBLOCK for non-blocking sockets */
return IsSocketErrorInProgress(code) || IsSocketErrorWouldBlock(code);
#else
/* on all other operating systems, there's just EAGAIN==EWOULDBLOCK */
return IsSocketErrorWouldBlock(code);
#endif
}
constexpr bool
IsSocketErrorReceiveWouldBlock(socket_error_t code) noexcept
{
#ifdef _WIN32
/* on Windows, WSAEINPROGRESS is for blocking sockets and
WSAEWOULDBLOCK for non-blocking sockets */
return IsSocketErrorInProgress(code) || IsSocketErrorWouldBlock(code);
#else
/* on all other operating systems, there's just
EAGAIN==EWOULDBLOCK */
return IsSocketErrorWouldBlock(code);
#endif
}
constexpr bool
IsSocketErrorAcceptWouldBlock(socket_error_t code) noexcept
{
#ifdef _WIN32
/* on Windows, WSAEINPROGRESS is for blocking sockets and
WSAEWOULDBLOCK for non-blocking sockets */
return IsSocketErrorInProgress(code) || IsSocketErrorWouldBlock(code);
#else
/* on all other operating systems, there's just
EAGAIN==EWOULDBLOCK */
return IsSocketErrorWouldBlock(code);
#endif
}
gcc_const
static inline bool
IsSocketErrorInterruped(socket_error_t code) noexcept
{
#ifdef _WIN32
return code == WSAEINTR;
#else
return code == EINTR;
#endif
}
gcc_const
static inline bool
IsSocketErrorClosed(socket_error_t code) noexcept
{
#ifdef _WIN32
return code == WSAECONNRESET;
#else
return code == EPIPE || code == ECONNRESET;
#endif
}
/**
* Helper class that formats a socket error message into a
* human-readable string. On Windows, a buffer is necessary for this,
* and this class hosts the buffer.
*/
class SocketErrorMessage {
#ifdef _WIN32
static constexpr unsigned msg_size = 256;
char msg[msg_size];
#else
const char *const msg;
#endif
public:
explicit SocketErrorMessage(socket_error_t code=GetSocketError()) noexcept;
operator const char *() const {
return msg;
}
};
gcc_const
static inline std::system_error
MakeSocketError(socket_error_t code, const char *msg) noexcept
{
#ifdef _WIN32
return MakeLastError(code, msg);
#else
return MakeErrno(code, msg);
#endif
}
gcc_pure
static inline std::system_error
MakeSocketError(const char *msg) noexcept
{
return MakeSocketError(GetSocketError(), msg);
}
#endif