You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
217 lines
6.4 KiB
217 lines
6.4 KiB
/** |
|
* Platform compatibility layer for POSIX functions on Windows |
|
*/ |
|
|
|
#ifndef PLATFORM_COMPAT_H |
|
#define PLATFORM_COMPAT_H |
|
|
|
#ifdef __cplusplus |
|
extern "C" { |
|
#endif |
|
|
|
|
|
#ifdef _WIN32 |
|
#include <winsock2.h> |
|
#include <ws2tcpip.h> |
|
#include <windows.h> |
|
#include <io.h> |
|
#include <time.h> |
|
#include <fcntl.h> |
|
#include <stdint.h> |
|
|
|
// Byte order conversion functions |
|
#ifdef _WIN32 |
|
#include <stdlib.h> |
|
#define htobe16(x) _byteswap_ushort(x) |
|
#define be16toh(x) _byteswap_ushort(x) |
|
#define htobe32(x) _byteswap_ulong(x) |
|
#define be32toh(x) _byteswap_ulong(x) |
|
#define htobe64(x) _byteswap_uint64(x) |
|
#define be64toh(x) _byteswap_uint64(x) |
|
#define htole64(x) (x) |
|
#define le64toh(x) (x) |
|
#else |
|
#include <endian.h> |
|
#endif |
|
|
|
// POSIX functions missing on Windows |
|
#define strcasecmp _stricmp |
|
#define strncasecmp _strnicmp |
|
#include <process.h> |
|
|
|
// memmem — not available on Windows |
|
#define memmem compat_memmem |
|
static inline void* compat_memmem(const void* h, size_t hl, const void* n, size_t nl) { |
|
if (nl == 0) return (void*)h; |
|
if (hl < nl) return NULL; |
|
const unsigned char* hay = (const unsigned char*)h; |
|
const unsigned char* ndl = (const unsigned char*)n; |
|
for (size_t i = 0; i <= hl - nl; i++) |
|
if (hay[i] == ndl[0] && memcmp(hay + i, ndl, nl) == 0) return (void*)(hay + i); |
|
return NULL; |
|
} |
|
|
|
// poll() and pollfd are already defined in winsock2.h on MSYS2 UCRT64 |
|
// Only define if not already present |
|
#ifndef POLLIN |
|
#define POLLIN 0x0001 |
|
#endif |
|
#ifndef POLLOUT |
|
#define POLLOUT 0x0004 |
|
#endif |
|
#ifndef POLLERR |
|
#define POLLERR 0x0008 |
|
#endif |
|
#ifndef POLLHUP |
|
#define POLLHUP 0x0010 |
|
#endif |
|
#ifndef POLLNVAL |
|
#define POLLNVAL 0x0020 |
|
#endif |
|
#ifndef POLLPRI |
|
#define POLLPRI 0x0002 |
|
#endif |
|
|
|
// ssize_t for Windows (signed size type) |
|
#ifndef _SSIZE_T_DEFINED |
|
typedef long ssize_t; |
|
#define _SSIZE_T_DEFINED |
|
#endif |
|
|
|
// gettimeofday for Windows - provide our own implementation if not already defined |
|
#ifndef _GETTIMEOFDAY_DEFINED |
|
#define _GETTIMEOFDAY_DEFINED |
|
static inline int utun_gettimeofday(struct timeval *tv, void *tz) { |
|
FILETIME ft; |
|
unsigned __int64 tmpres = 0; |
|
|
|
if (tv != NULL) { |
|
GetSystemTimeAsFileTime(&ft); |
|
tmpres |= ft.dwHighDateTime; |
|
tmpres <<= 32; |
|
tmpres |= ft.dwLowDateTime; |
|
// Convert from 100-nanosecond intervals to microseconds |
|
tmpres /= 10; |
|
// Convert to Unix epoch (January 1, 1970) |
|
tmpres -= 11644473600000000ULL; |
|
tv->tv_sec = (long)(tmpres / 1000000UL); |
|
tv->tv_usec = (long)(tmpres % 1000000UL); |
|
} |
|
|
|
// tz parameter is ignored (for compatibility with POSIX) |
|
|
|
return 0; |
|
} |
|
#endif // _GETTIMEOFDAY_DEFINED |
|
|
|
// Pipe creation for Windows |
|
static inline int platform_pipe(int pipefd[2]) { |
|
return _pipe(pipefd, 4096, _O_BINARY); |
|
} |
|
#define pipe platform_pipe |
|
|
|
// nfds_t already defined in winsock2.h on MSYS2 |
|
|
|
// fcntl replacement for Windows (simplified - only supports F_GETFL/F_SETFL with O_NONBLOCK) |
|
#ifndef F_GETFL |
|
#define F_GETFL 3 |
|
#endif |
|
#ifndef F_SETFL |
|
#define F_SETFL 4 |
|
#endif |
|
#ifndef O_NONBLOCK |
|
#define O_NONBLOCK 0x4000 |
|
#endif |
|
|
|
static inline int platform_fcntl(int fd, int cmd, ... /* arg */ ) { |
|
va_list ap; |
|
va_start(ap, cmd); |
|
|
|
if (cmd == F_GETFL) { |
|
va_end(ap); |
|
// Return current flags (always 0 on Windows, can't query easily) |
|
return 0; |
|
} else if (cmd == F_SETFL) { |
|
int flags = va_arg(ap, int); |
|
va_end(ap); |
|
if (flags & O_NONBLOCK) { |
|
// Set non-blocking mode |
|
u_long mode = 1; |
|
return ioctlsocket(fd, FIONBIO, &mode); |
|
} |
|
return 0; |
|
} |
|
|
|
va_end(ap); |
|
errno = EINVAL; |
|
return -1; |
|
} |
|
#define fcntl platform_fcntl |
|
|
|
// nanosleep already defined in pthread_time.h on MSYS2 |
|
// poll() and pollfd already defined in winsock2.h on MSYS2 |
|
// Use WSAPoll on Windows (available in Vista and later) |
|
#define poll WSAPoll |
|
|
|
// sa_family_t might not be defined on some Windows setups |
|
#ifndef sa_family_t |
|
typedef unsigned short sa_family_t; |
|
#endif |
|
|
|
#else |
|
// POSIX - include standard headers |
|
#include <sys/time.h> |
|
#include <sys/types.h> |
|
#include <sys/socket.h> |
|
#include <strings.h> |
|
#include <arpa/inet.h> |
|
#include <netinet/in.h> |
|
#include <netdb.h> |
|
#include <fcntl.h> |
|
#include <unistd.h> |
|
#include <poll.h> |
|
#define utun_gettimeofday(A,B) gettimeofday(A,B) |
|
|
|
#endif |
|
|
|
#include <stdint.h> |
|
|
|
// Generate cryptographically secure random bytes |
|
// Returns 0 on success, -1 on error |
|
int random_bytes(uint8_t *buffer, size_t len); |
|
|
|
// Get IPv4 address of interface by its index (ifindex) |
|
// Returns IPv4 address in network byte order, 0 on error |
|
uint32_t get_interface_ip_by_index(uint32_t netif_index); |
|
|
|
// Get IPv6 address of interface by its index (ifindex) |
|
// temporary=1: get temporary (privacy) IPv6, temporary=0: get permanent IPv6 |
|
// Returns 0 on success (fills addr_out with 16 bytes), -1 on error or not found |
|
int get_interface_ipv6_by_index(uint32_t netif_index, int temporary, uint8_t* addr_out); |
|
|
|
// Get IPv6 address using netlink (Linux-only, accurate IFA_F_* flags) |
|
// prefer_stable=1: prefer permanent/stable (IFA_F_MANAGETEMPADDR) over temporary |
|
// prefer_stable=0: prefer temporary over stable |
|
// Returns 0 on success (fills addr_out with 16 bytes), -1 on error |
|
int get_interface_ipv6_addr_nl(uint32_t netif_index, int prefer_stable, uint8_t* addr_out); |
|
|
|
// Determine the interface index for the default route (outgoing traffic) |
|
// Creates a temp UDP socket, connects to a well-known address to force |
|
// kernel routing, then matches the chosen source IP to getifaddrs() |
|
// family: AF_INET or AF_INET6, returns ifindex (0 on failure) |
|
uint32_t get_default_route_netif_index(int family); |
|
|
|
|
|
// Cross-platform mkdir |
|
#ifdef _WIN32 |
|
#include <direct.h> |
|
#define utun_mkdir(path, mode) _mkdir(path) |
|
#else |
|
#include <sys/stat.h> |
|
#define utun_mkdir(path, mode) mkdir(path, mode) |
|
#endif |
|
|
|
#ifdef __cplusplus |
|
} |
|
#endif |
|
#endif // PLATFORM_COMPAT_H
|
|
|