1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2022 The Limenka developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 6 #ifndef LIMENKA_COMPAT_COMPAT_H
7 #define LIMENKA_COMPAT_COMPAT_H
8 9 // Windows defines FD_SETSIZE to 64 (see _fd_types.h in mingw-w64),
10 // which is too small for our usage, but allows us to redefine it safely.
11 // We redefine it to be 1024, to match glibc, see typesizes.h.
12 #ifdef WIN32
13 #ifdef FD_SETSIZE
14 #undef FD_SETSIZE
15 #endif
16 #define FD_SETSIZE 1024
17 #include <winsock2.h>
18 #include <ws2tcpip.h>
19 #include <cstdint>
20 #else
21 #include <arpa/inet.h> // IWYU pragma: export
22 #include <fcntl.h> // IWYU pragma: export
23 #include <ifaddrs.h> // IWYU pragma: export
24 #include <net/if.h> // IWYU pragma: export
25 #include <netdb.h> // IWYU pragma: export
26 #include <netinet/in.h> // IWYU pragma: export
27 #include <netinet/tcp.h> // IWYU pragma: export
28 #include <sys/mman.h> // IWYU pragma: export
29 #include <sys/select.h> // IWYU pragma: export
30 #include <sys/socket.h> // IWYU pragma: export
31 #include <sys/types.h> // IWYU pragma: export
32 #include <unistd.h> // IWYU pragma: export
33 #endif
34 35 // Windows does not have `sa_family_t` - it defines `sockaddr::sa_family` as `u_short`.
36 // Thus define `sa_family_t` on Windows too so that the rest of the code can use `sa_family_t`.
37 // See https://learn.microsoft.com/en-us/windows/win32/api/winsock/ns-winsock-sockaddr#syntax
38 #ifdef WIN32
39 typedef u_short sa_family_t;
40 #endif
41 42 // We map Linux / BSD error functions and codes, to the equivalent
43 // Windows definitions, and use the WSA* names throughout our code.
44 // Note that glibc defines EWOULDBLOCK as EAGAIN (see errno.h).
45 #ifndef WIN32
46 typedef unsigned int SOCKET;
47 #include <cerrno>
48 #define WSAGetLastError() errno
49 #define WSAEINVAL EINVAL
50 #define WSAEWOULDBLOCK EWOULDBLOCK
51 #define WSAEAGAIN EAGAIN
52 #define WSAEMSGSIZE EMSGSIZE
53 #define WSAEINTR EINTR
54 #define WSAEINPROGRESS EINPROGRESS
55 #define WSAEADDRINUSE EADDRINUSE
56 #define INVALID_SOCKET (SOCKET)(~0)
57 #define SOCKET_ERROR -1
58 #else
59 // WSAEAGAIN doesn't exist on Windows
60 #ifdef EAGAIN
61 #define WSAEAGAIN EAGAIN
62 #else
63 #define WSAEAGAIN WSAEWOULDBLOCK
64 #endif
65 #endif
66 67 // Windows defines MAX_PATH as it's maximum path length.
68 // We define MAX_PATH for use on non-Windows systems.
69 #ifndef WIN32
70 #define MAX_PATH 1024
71 #endif
72 73 // ssize_t is POSIX, and not present when using MSVC.
74 #ifdef _MSC_VER
75 #include <BaseTsd.h>
76 typedef SSIZE_T ssize_t;
77 #endif
78 79 // The type of the option value passed to getsockopt & setsockopt
80 // differs between Windows and non-Windows.
81 #ifndef WIN32
82 typedef void* sockopt_arg_type;
83 #else
84 typedef char* sockopt_arg_type;
85 #endif
86 87 #ifdef WIN32
88 // Export main() and ensure working ASLR when using mingw-w64.
89 // Exporting a symbol will prevent the linker from stripping
90 // the .reloc section from the binary, which is a requirement
91 // for ASLR. While release builds are not affected, anyone
92 // building with a binutils < 2.36 is subject to this ld bug.
93 #define MAIN_FUNCTION __declspec(dllexport) int main(int argc, char* argv[])
94 #else
95 #define MAIN_FUNCTION int main(int argc, char* argv[])
96 #endif
97 98 // Note these both should work with the current usage of poll, but best to be safe
99 // WIN32 poll is broken https://daniel.haxx.se/blog/2012/10/10/wsapoll-is-broken/
100 // __APPLE__ poll is broke https://github.com/limenka/limenka/pull/14336#issuecomment-437384408
101 #if defined(__linux__)
102 #define USE_POLL
103 #endif
104 105 // MSG_NOSIGNAL is not available on some platforms, if it doesn't exist define it as 0
106 #if !defined(MSG_NOSIGNAL)
107 #define MSG_NOSIGNAL 0
108 #endif
109 110 // MSG_DONTWAIT is not available on some platforms, if it doesn't exist define it as 0
111 #if !defined(MSG_DONTWAIT)
112 #define MSG_DONTWAIT 0
113 #endif
114 115 #endif // LIMENKA_COMPAT_COMPAT_H
116