public static unsafe Interop.Sys.IPAddress GetNativeIPAddress(this IPAddress ipAddress)
{
var nativeIPAddress = default(Interop.Sys.IPAddress);
ipAddress.TryWriteBytes(new Span <byte>(nativeIPAddress.Address, Interop.Sys.IPv6AddressBytes), out int bytesWritten);
Debug.Assert(bytesWritten == sizeof(uint) || bytesWritten == Interop.Sys.IPv6AddressBytes, $"Unexpected length: {bytesWritten}");
if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
{
nativeIPAddress.IsIPv6 = true;
nativeIPAddress.ScopeId = (uint)ipAddress.ScopeId;
}
return(nativeIPAddress);
}
internal SocketAddress(IPAddress ipAddress)
: this(ipAddress.AddressFamily,
((ipAddress.AddressFamily == AddressFamily.InterNetwork) ? IPv4AddressSize : IPv6AddressSize))
{
// No Port
m_Buffer[2] = (byte)0;
m_Buffer[3] = (byte)0;
if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
{
// No handling for Flow Information
m_Buffer[4] = (byte)0;
m_Buffer[5] = (byte)0;
m_Buffer[6] = (byte)0;
m_Buffer[7] = (byte)0;
// Scope serialization
long scope = ipAddress.ScopeId;
m_Buffer[24] = (byte)scope;
m_Buffer[25] = (byte)(scope >> 8);
m_Buffer[26] = (byte)(scope >> 16);
m_Buffer[27] = (byte)(scope >> 24);
// Address serialization
byte[] addressBytes = ipAddress.GetAddressBytes();
for (int i = 0; i < addressBytes.Length; i++)
{
m_Buffer[8 + i] = addressBytes[i];
}
}
else
{
// IPv4 Address serialization
#if MONO
ipAddress.TryWriteBytes(m_Buffer.AsSpan(4), out int bytesWritten);
#else
m_Buffer[4] = unchecked ((byte)(ipAddress.m_Address));
m_Buffer[5] = unchecked ((byte)(ipAddress.m_Address >> 8));
m_Buffer[6] = unchecked ((byte)(ipAddress.m_Address >> 16));
m_Buffer[7] = unchecked ((byte)(ipAddress.m_Address >> 24));
#endif
}
}
public static unsafe string?TryGetNameInfo(IPAddress addr, out SocketError socketError, out int nativeErrorCode)
{
byte *buffer = stackalloc byte[Interop.Sys.NI_MAXHOST + 1 /*for null*/];
byte isIPv6;
int rawAddressLength;
if (addr.AddressFamily == AddressFamily.InterNetwork)
{
isIPv6 = 0;
rawAddressLength = IPAddressParserStatics.IPv4AddressBytes;
}
else
{
isIPv6 = 1;
rawAddressLength = IPAddressParserStatics.IPv6AddressBytes;
}
byte *rawAddress = stackalloc byte[rawAddressLength];
addr.TryWriteBytes(new Span <byte>(rawAddress, rawAddressLength), out int bytesWritten);
Debug.Assert(bytesWritten == rawAddressLength);
int error = Interop.Sys.GetNameInfo(
rawAddress,
(uint)rawAddressLength,
isIPv6,
buffer,
Interop.Sys.NI_MAXHOST,
null,
0,
Interop.Sys.GetNameInfoFlags.NI_NAMEREQD);
socketError = GetSocketErrorForNativeError(error);
nativeErrorCode = error;
return(socketError == SocketError.Success ? Marshal.PtrToStringAnsi((IntPtr)buffer) : null);
}