static IPAddress()
{
// Note: this type is marked as 'beforefieldinit'.
byte[] address = new byte[16];
IPAddress.IPv6Any = new IPAddress(address, 0L);
IPAddress.IPv6Loopback = new IPAddress(new byte[]
{
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
1
}, 0L);
byte[] address2 = new byte[16];
IPAddress.IPv6None = new IPAddress(address2, 0L);
}
private unsafe static IPAddress InternalParse(string ipString, bool tryParse)
{
if (ipString == null)
{
if (tryParse)
{
return null;
}
throw new ArgumentNullException("ipString");
}
else
{
if (ipString.IndexOf(':') != -1)
{
SocketException innerException;
if (Socket.OSSupportsIPv6)
{
byte[] array = new byte[16];
SocketAddress socketAddress = new SocketAddress(AddressFamily.InterNetworkV6, 28);
if (OSSOCK.WSAStringToAddress(ipString, AddressFamily.InterNetworkV6, IntPtr.Zero, socketAddress.m_Buffer, ref socketAddress.m_Size) == SocketError.Success)
{
for (int i = 0; i < 16; i++)
{
array[i] = socketAddress[i + 8];
}
long scopeid = (long)(((int)socketAddress[27] << 24) + ((int)socketAddress[26] << 16) + ((int)socketAddress[25] << 8) + (int)socketAddress[24]);
return new IPAddress(array, scopeid);
}
if (tryParse)
{
return null;
}
innerException = new SocketException();
}
else
{
int start = 0;
if (ipString[0] != '[')
{
ipString += ']';
}
else
{
start = 1;
}
int length = ipString.Length;
fixed (char* name = ipString)
{
if (IPv6AddressHelper.IsValidStrict(name, start, ref length) || length != ipString.Length)
{
ushort[] array2 = new ushort[8];
string text = null;
fixed (ushort* ptr = array2)
{
IPv6AddressHelper.Parse(ipString, ptr, 0, ref text);
}
IPAddress result;
if (text == null || text.Length == 0)
{
result = new IPAddress(array2, 0u);
}
else
{
text = text.Substring(1);
uint scopeid2;
if (!uint.TryParse(text, NumberStyles.None, null, out scopeid2))
{
goto IL_193;
}
result = new IPAddress(array2, scopeid2);
}
return result;
}
IL_193: ;
}
if (tryParse)
{
return null;
}
innerException = new SocketException(SocketError.InvalidArgument);
}
throw new FormatException("dns_bad_ip_address" + innerException);
}
Socket.InitializeSockets();
int length2 = ipString.Length;
long num;
fixed (char* name2 = ipString)
{
num = IPv4AddressHelper.ParseNonCanonical(name2, 0, ref length2, true);
}
if (num != -1L && length2 == ipString.Length)
{
num = ((num & 255L) << 24 | ((num & 65280L) << 8 | ((num & 16711680L) >> 8 | (num & 1095216660480) >> 24)));
return new IPAddress(num);
}
if (tryParse)
{
return null;
}
throw new FormatException("dns_bad_ip_address");
}
}
/// <summary>Indicates whether the specified IP address is the loopback address.</summary>
/// <returns>true if <paramref name="address" /> is the loopback address; otherwise, false.</returns>
/// <param name="address">An IP address. </param>
public static bool IsLoopback(IPAddress address)
{
if (address == null)
{
throw new ArgumentNullException("address");
}
if (address.m_Family == AddressFamily.InterNetworkV6)
{
return address.Equals(IPAddress.IPv6Loopback);
}
return (address.m_Address & 255L) == (IPAddress.Loopback.m_Address & 255L);
}
/// <summary>Determines whether a string is a valid IP address.</summary>
/// <returns>true if <paramref name="ipString" /> is a valid IP address; otherwise, false.</returns>
/// <param name="ipString">The string to validate.</param>
/// <param name="address">The <see cref="T:System.Net.IPAddress" /> version of the string.</param>
public static bool TryParse(string ipString, out IPAddress address)
{
address = IPAddress.InternalParse(ipString, true);
return address != null;
}