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Location: cpp/openttd-patchpack/source/src/network/core/os_abstraction.h - annotation
r28278:1fc682037ca2
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* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file os_abstraction.h Network stuff has many things that needs to be
* included and/or implemented by default.
* All those things are in this file.
*/
#ifndef NETWORK_CORE_OS_ABSTRACTION_H
#define NETWORK_CORE_OS_ABSTRACTION_H
/**
* Abstraction of a network error where all implementation details of the
* error codes are encapsulated in this class and the abstraction layer.
*/
class NetworkError {
private:
int error; ///< The underlying error number from errno or WSAGetLastError.
mutable std::string message; ///< The string representation of the error (set on first call to #AsString).
public:
NetworkError(int error);
bool HasError() const;
bool WouldBlock() const;
bool IsConnectionReset() const;
bool IsConnectInProgress() const;
const std::string &AsString() const;
static NetworkError GetLast();
};
/* Include standard stuff per OS */
/* Windows stuff */
#if defined(_WIN32)
#include <errno.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
/* Windows has some different names for some types */
typedef unsigned long in_addr_t;
/* Handle cross-compilation with --build=*-*-cygwin --host=*-*-mingw32 */
#if defined(__MINGW32__) && !defined(AI_ADDRCONFIG)
# define AI_ADDRCONFIG 0x00000400
#endif
#if !(defined(__MINGW32__) || defined(__CYGWIN__))
/* Windows has some different names for some types */
typedef SSIZE_T ssize_t;
typedef int socklen_t;
# define IPPROTO_IPV6 41
#endif /* !(__MINGW32__ && __CYGWIN__) */
#endif /* _WIN32 */
/* UNIX stuff */
#if defined(UNIX)
# if defined(OPENBSD) || defined(__NetBSD__)
# define AI_ADDRCONFIG 0
# endif
# define SOCKET int
# define INVALID_SOCKET -1
# define closesocket close
/* Need this for FIONREAD on solaris */
# define BSD_COMP
/* Includes needed for UNIX-like systems */
# include <unistd.h>
# include <sys/ioctl.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <netinet/tcp.h>
# include <arpa/inet.h>
# include <net/if.h>
# include <ifaddrs.h>
# if !defined(INADDR_NONE)
# define INADDR_NONE 0xffffffff
# endif
# if defined(__GLIBC__) && (__GLIBC__ <= 2) && (__GLIBC_MINOR__ <= 1)
typedef uint32_t in_addr_t;
# endif
# include <errno.h>
# include <sys/time.h>
# include <netdb.h>
# if defined(__EMSCRIPTEN__)
/* Emscripten doesn't support AI_ADDRCONFIG and errors out on it. */
# undef AI_ADDRCONFIG
# define AI_ADDRCONFIG 0
/* Emscripten says it supports FD_SETSIZE fds, but it really only supports 64.
* https://github.com/emscripten-core/emscripten/issues/1711 */
# undef FD_SETSIZE
# define FD_SETSIZE 64
# endif
/* Haiku says it supports FD_SETSIZE fds, but it really only supports 512. */
# if defined(__HAIKU__)
# undef FD_SETSIZE
# define FD_SETSIZE 512
# endif
#endif /* UNIX */
#ifdef __EMSCRIPTEN__
/**
* Emscripten doesn't set 'addrlen' for accept(), getsockname(), getpeername()
* and recvfrom(), which confuses other functions and causes them to crash.
* This function needs to be called after these four functions to make sure
* 'addrlen' is patched up.
*
* https://github.com/emscripten-core/emscripten/issues/12996
*
* @param address The address returned by those four functions.
* @return The correct value for addrlen.
*/
static inline socklen_t FixAddrLenForEmscripten(struct sockaddr_storage &address)
{
switch (address.ss_family) {
case AF_INET6: return sizeof(struct sockaddr_in6);
case AF_INET: return sizeof(struct sockaddr_in);
default: NOT_REACHED();
}
}
#endif
bool SetNonBlocking(SOCKET d);
bool SetNoDelay(SOCKET d);
bool SetReusePort(SOCKET d);
NetworkError GetSocketError(SOCKET d);
/* Make sure these structures have the size we expect them to be */
static_assert(sizeof(in_addr) == 4); ///< IPv4 addresses should be 4 bytes.
static_assert(sizeof(in6_addr) == 16); ///< IPv6 addresses should be 16 bytes.
#endif /* NETWORK_CORE_OS_ABSTRACTION_H */
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