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