/// <summary>
/// Overrides System.Object.ToString to return
/// this object rendered in a quad-dotted notation
/// </summary>
public override string ToString()
{
if (m_Family == AddressFamily.InterNetwork)
{
return(ToString(m_Address));
}
else
{
ushort[] numbers = m_Numbers.Clone() as ushort[];
for (int i = 0; i < numbers.Length; i++)
{
numbers[i] = (ushort)NetworkToHostOrder((short)numbers[i]);
}
IPv6Address v6 = new IPv6Address(numbers);
v6.ScopeId = ScopeId;
return(v6.ToString());
}
}
public static bool TryParse(string ipString, out IPv6Address result)
{
result = null;
if (ipString == null)
{
return(false);
}
if (ipString.Length > 2 &&
ipString [0] == '[' &&
ipString [ipString.Length - 1] == ']')
{
ipString = ipString.Substring(1, ipString.Length - 2);
}
if (ipString.Length < 2)
{
return(false);
}
int prefixLen = 0;
int scopeId = 0;
int pos = ipString.LastIndexOf('/');
if (pos != -1)
{
string prefix = ipString.Substring(pos + 1);
if (!TryParse(prefix, out prefixLen))
{
prefixLen = -1;
}
if (prefixLen < 0 || prefixLen > 128)
{
return(false);
}
ipString = ipString.Substring(0, pos);
}
else
{
pos = ipString.LastIndexOf('%');
if (pos != -1)
{
string prefix = ipString.Substring(pos + 1);
if (!TryParse(prefix, out scopeId))
{
scopeId = 0;
}
ipString = ipString.Substring(0, pos);
}
}
//
// At this point the prefix/suffixes have been removed
// and we only have to deal with the ipv4 or ipv6 addressed
//
ushort [] addr = new ushort [8];
//
// Is there an ipv4 address at the end?
//
bool ipv4 = false;
int pos2 = ipString.LastIndexOf(':');
if (pos2 == -1)
{
return(false);
}
int slots = 0;
if (pos2 < (ipString.Length - 1))
{
string ipv4Str = ipString.Substring(pos2 + 1);
if (ipv4Str.IndexOf('.') != -1)
{
IPAddress ip;
if (!IPAddress.TryParse(ipv4Str, out ip))
{
return(false);
}
long a = ip.InternalIPv4Address;
addr [6] = (ushort)(((int)(a & 0xff) << 8) + ((int)((a >> 8) & 0xff)));
addr [7] = (ushort)(((int)((a >> 16) & 0xff) << 8) + ((int)((a >> 24) & 0xff)));
if (pos2 > 0 && ipString [pos2 - 1] == ':')
{
ipString = ipString.Substring(0, pos2 + 1);
}
else
{
ipString = ipString.Substring(0, pos2);
}
ipv4 = true;
slots = 2;
}
}
//
// Only an ipv6 block remains, either:
// "hexnumbers::hexnumbers", "hexnumbers::" or "hexnumbers"
//
int c = ipString.IndexOf("::", StringComparison.Ordinal);
if (c != -1)
{
int right_slots = Fill(addr, ipString.Substring(c + 2));
if (right_slots == -1)
{
return(false);
}
if (right_slots + slots > 8)
{
return(false);
}
int d = 8 - slots - right_slots;
for (int i = right_slots; i > 0; i--)
{
addr [i + d - 1] = addr [i - 1];
addr [i - 1] = 0;
}
int left_slots = Fill(addr, ipString.Substring(0, c));
if (left_slots == -1)
{
return(false);
}
if (left_slots + right_slots + slots > 7)
{
return(false);
}
}
else
{
if (Fill(addr, ipString) != 8 - slots)
{
return(false);
}
}
// Now check the results in the ipv6-address range only
bool ipv6 = false;
for (int i = 0; i < slots; i++)
{
if (addr [i] != 0 || i == 5 && addr [i] != 0xffff)
{
ipv6 = true;
}
}
// check IPv4 validity
if (ipv4 && !ipv6)
{
for (int i = 0; i < 5; i++)
{
if (addr [i] != 0)
{
return(false);
}
}
if (addr [5] != 0 && addr [5] != 0xffff)
{
return(false);
}
}
result = new IPv6Address(addr, prefixLen, scopeId);
return(true);
}