private static bool IsUnixExecutable(string path)
{
var platform = Environment.OSVersion.Platform;
if (platform != PlatformID.Unix && platform != PlatformID.MacOSX)
{
return(false);
}
return(Posix.access(path, Posix.X_OK) == 0);
}
private IntPtr RegisterPlatformSpecific(string absoluteFilePath,
out NativeLibrary.SymbolLookupDelegate symbolLookup)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
var handle = Posix.dlopen(absoluteFilePath, Posix.RTLD_LAZY | Posix.RTLD_GLOBAL);
if (handle == IntPtr.Zero)
{
throw new NativeLoaderException(
$"Failed to load '{absoluteFilePath}'. dlerror: {Marshal.PtrToStringAnsi(Posix.dlerror())}");
}
symbolLookup = Posix.dlsym;
return(handle);
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
var handle = Posix.dlopen(absoluteFilePath, Posix.RTLD_LAZY | Posix.RTLD_GLOBAL);
if (handle == IntPtr.Zero)
{
throw new NativeLoaderException(
$"Failed to load '{absoluteFilePath}'. dlerror: {Marshal.PtrToStringAnsi(Posix.dlerror())}");
}
symbolLookup = Posix.dlsym;
return(handle);
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
var dllDirectory = Path.GetDirectoryName(absoluteFilePath);
var fileName = Path.GetFileName(absoluteFilePath);
Windows.SetDllDirectory(dllDirectory);
var handle = Windows.LoadLibrary(fileName);
if (handle == IntPtr.Zero)
{
throw new NativeLoaderException(
$"Failed to load '{absoluteFilePath}'. LoadLibrary: {Windows.GetLastError():X8}");
}
symbolLookup = Windows.GetProcAddress;
return(handle);
}
throw new NativeLoaderException($"Platform '{Environment.OSVersion.Platform}' is not supported.");
}
static internal void UnregisterCallResult(IntPtr pCallback, SteamAPICall_t callback)
{
if (Config.Os == OsType.Windows)
{
Win64.SteamAPI_UnregisterCallResult(pCallback, callback);
}
else if (Config.Os == OsType.Posix)
{
Posix.SteamAPI_UnregisterCallResult(pCallback, callback);
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal bool GameServer_Init(uint unIP, ushort usPort, ushort usGamePort, ushort usQueryPort, int eServerMode, [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(Utf8StringToNative))] string pchVersionString)
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamInternal_GameServer_Init(unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString));
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamInternal_GameServer_Init(unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString));
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal HSteamPipe GetHSteamPipe()
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamGameServer_GetHSteamPipe());
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamGameServer_GetHSteamPipe());
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal void Shutdown()
{
if (Config.Os == OsType.Windows)
{
Win64.SteamGameServer_Shutdown();
}
else if (Config.Os == OsType.Posix)
{
Posix.SteamGameServer_Shutdown();
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal void RunCallbacks()
{
if (Config.Os == OsType.Windows)
{
Win64.SteamAPI_RunCallbacks();
}
else if (Config.Os == OsType.Posix)
{
Posix.SteamAPI_RunCallbacks();
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal bool Init()
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamAPI_Init());
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamAPI_Init());
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal bool RestartAppIfNecessary(uint unOwnAppID)
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamAPI_RestartAppIfNecessary(unOwnAppID));
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamAPI_RestartAppIfNecessary(unOwnAppID));
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal IntPtr CreateInterface([MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(Utf8StringToNative))] string version)
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamInternal_CreateInterface(version));
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamInternal_CreateInterface(version));
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
public static void PreloadDll(string dllName)
{
var dllDir = GetDirectedDllDirectory();
// Not using OperatingSystem.Platform.
// See: https://www.mono-project.com/docs/faq/technical/#how-to-detect-the-execution-platform
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
Win32.LoadDll(dllDir, dllName);
}
else
{
Posix.LoadDll(dllDir, dllName);
}
}
static internal IntPtr CreateInterface(string version)
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamInternal_CreateInterface(version));
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamInternal_CreateInterface(version));
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal IntPtr FindOrCreateGameServerInterface(int steamuser, string versionname)
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamInternal_FindOrCreateGameServerInterface(steamuser, versionname));
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamInternal_FindOrCreateGameServerInterface(steamuser, versionname));
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
static internal bool GameServer_Init(uint unIP, ushort usPort, ushort usGamePort, ushort usQueryPort, int eServerMode, string pchVersionString)
{
if (Config.Os == OsType.Windows)
{
return(Win64.SteamInternal_GameServer_Init(unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString));
}
else if (Config.Os == OsType.Posix)
{
return(Posix.SteamInternal_GameServer_Init(unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString));
}
else
{
throw new System.Exception("this platform isn't supported");
}
}
private static bool IsMusl()
{
#if NETSTANDARD1_1
var cpu = RuntimeInformation.ProcessArchitecture;
switch (cpu)
{
case Architecture.X86:
return(Posix.AccessCheck("/lib/libc.musl-x86.so.1", 0) == 0);
case Architecture.X64:
return(Posix.AccessCheck("/lib/libc.musl-x86_64.so.1", 0) == 0);
case Architecture.Arm:
return(Posix.AccessCheck("/lib/libc.musl-armv7.so.1", 0) == 0);
case Architecture.Arm64:
return(Posix.AccessCheck("/lib/libc.musl-aarch64.so.1", 0) == 0);
default: throw new PlatformNotSupportedException(cpu.ToString());
}
#else
using (var proc = Process.GetCurrentProcess()) {
foreach (ProcessModule mod in proc.Modules)
{
var fileName = mod.FileName;
if (!fileName.Contains("libc"))
{
continue;
}
if (fileName.Contains("musl"))
{
return(true);
}
break;
}
}
return(false);
#endif
}
/// <summary>
/// unix specific code, we want to poll for packets
/// otherwise if we call pcap_dispatch() the read() will block
/// and won't resume until a packet arrives OR until a signal
/// occurs
/// </summary>
/// <param name="timeout">
/// Timeout chosen to allow the capture thread to loop frequently enough
/// to enable it to properly exit when the user requests it to but
/// infrequently enough to cause any noticable performance overhead
/// </param>
/// <returns>true if poll was successfull and we have data to read, false otherwise</returns>
protected internal bool PollFileDescriptor(int timeout = 500)
{
if (FileDescriptor < 0)
{
// Either this is a File Capture, or Windows
// Assume we have data to read
return(true);
}
var pollFds = new Posix.Pollfd[1];
pollFds[0].fd = FileDescriptor;
pollFds[0].events = Posix.PollEvents.POLLPRI | Posix.PollEvents.POLLIN;
var result = Posix.Poll(pollFds, (uint)pollFds.Length, timeout);
// if we have no poll results, we don't have anything to read
// -1 means error
// 0 means timeout
// non-negative means we got something
return(result != 0);
}
/// <summary>
/// The capture thread
/// </summary>
protected virtual void CaptureThread(CancellationToken cancellationToken)
{
if (!Opened)
{
throw new DeviceNotReadyException("Capture called before PcapDevice.Open()");
}
var Callback = new LibPcapSafeNativeMethods.pcap_handler(PacketHandler);
Posix.Pollfd[] pollFds = null;
// unix specific code
if (UsePosixPoll)
{
// retrieve the file descriptor of the adapter for use with poll()
var captureFileDescriptor = LibPcapSafeNativeMethods.pcap_fileno(PcapHandle);
if (captureFileDescriptor == -1)
{
SendCaptureStoppedEvent(CaptureStoppedEventStatus.ErrorWhileCapturing);
return;
}
pollFds = new Posix.Pollfd[1];
pollFds[0].fd = captureFileDescriptor;
pollFds[0].events = Posix.PollEvents.POLLPRI | Posix.PollEvents.POLLIN;
}
while (!cancellationToken.IsCancellationRequested)
{
// unix specific code, we want to poll for packets
// otherwise if we call pcap_dispatch() the read() will block
// and won't resume until a packet arrives OR until a signal
// occurs
if (pollFds != null)
{
// Timeout chosen to allow the capture thread to loop frequently enough
// to enable it to properly exit when the user requests it to but
// infrequently enough to cause any noticable performance overhead
const int millisecondTimeout = 500;
// block here
var result = Posix.Poll(pollFds, (uint)pollFds.Length, millisecondTimeout);
// if we have no poll results, just loop
if (result <= 0)
{
continue;
}
// fall through here to the pcap_dispatch() call
}
int res = LibPcapSafeNativeMethods.pcap_dispatch(PcapHandle, m_pcapPacketCount, Callback, IntPtr.Zero);
// pcap_dispatch() returns the number of packets read or, a status value if the value
// is negative
if (res <= 0)
{
switch (res) // Check pcap loop status results and notify upstream.
{
case Pcap.LOOP_USER_TERMINATED: // User requsted loop termination with StopCapture()
SendCaptureStoppedEvent(CaptureStoppedEventStatus.CompletedWithoutError);
return;
case Pcap.LOOP_COUNT_EXHAUSTED: // m_pcapPacketCount exceeded (successful exit)
{
// NOTE: pcap_dispatch() returns 0 when a timeout occurrs so to prevent timeouts
// from causing premature exiting from the capture loop we only consider
// exhausted events to cause an escape from the loop when they are from
// offline devices, ie. files read from disk
if (this is CaptureFileReaderDevice)
{
SendCaptureStoppedEvent(CaptureStoppedEventStatus.CompletedWithoutError);
return;
}
break;
}
case Pcap.LOOP_EXIT_WITH_ERROR: // An error occurred whilst capturing.
SendCaptureStoppedEvent(CaptureStoppedEventStatus.ErrorWhileCapturing);
return;
default: // This can only be triggered by a bug in libpcap.
throw new PcapException("Unknown pcap_loop exit status.");
}
}
else // res > 0
{
// if we aren't capturing infinitely we need to account for
// the packets that we read
if (m_pcapPacketCount != Pcap.InfinitePacketCount)
{
// take away for the packets read
if (m_pcapPacketCount >= res)
{
m_pcapPacketCount -= res;
}
else
{
m_pcapPacketCount = 0;
}
// no more packets to capture, we are finished capturing
if (m_pcapPacketCount == 0)
{
SendCaptureStoppedEvent(CaptureStoppedEventStatus.CompletedWithoutError);
return;
}
}
}
}
SendCaptureStoppedEvent(CaptureStoppedEventStatus.CompletedWithoutError);
}
// TODO return better error messages here. public static string GetError(uint status) => OperatingSystem.IsWindows() ? Windows.GetError(status) : Posix.GetError(status);
