public static bool IsMulticast(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return((address.IsIPv4() && (bytes[15 - 3] & 0xF0) == 0xE0) ||
(bytes[15 - 15] == 0xFF));
}
public static bool IsRFC3927(this IPAddress address)
{
address = address.EnsureIPv6();
var bytes = address.GetAddressBytes();
return(address.IsIPv4() && (bytes[15 - 3] == 169 && bytes[15 - 2] == 254));
}
/// <summary>240.0.0.0/4 Reserved.</summary>
public static bool IsRFC1112(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return(address.IsIPv4() && (
(bytes[15 - 3] & 240) == 240));
}
public static bool IsValid(this IPAddress address)
{
address = address.EnsureIPv6();
var ip = address.GetAddressBytes();
// unspecified IPv6 address (::/128)
byte[] ipNone = new byte[16];
if ((Utils.ArrayEqual(ip, 0, ipNone, 0, 16) ? 0 : 1) == 0)
{
return(false);
}
// documentation IPv6 address
if (address.IsRFC3849())
{
return(false);
}
if (address.IsIPv4())
{
//// INADDR_NONE
if (Utils.ArrayEqual(ip, 12, new byte[] { 0xFF, 0xFF, 0xFF, 0xFF }, 0, 4))
{
return(false);
}
//// 0
if (Utils.ArrayEqual(ip, 12, new byte[] { 0x0, 0x0, 0x0, 0x0 }, 0, 4))
{
return(false);
}
}
return(true);
}
/// <summary>192.0.0.0/24 IETF Protocol Assignments.</summary>
public static bool IsRFC6890(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return(address.IsIPv4() && (
bytes[15 - 3] == 192 && bytes[15 - 2] == 0 && bytes[15 - 1] == 0));
}
public Node FindByIp(IPAddress ip)
{
ip = ip.EnsureIPv6();
var endpoint = new IPEndPoint(ip, 0);
return(_Nodes.Where(n => Match(endpoint, n.Key, ignorePort: true)).Select(s => s.Key).FirstOrDefault());
}
/// <summary>198.18.0.0/15 Benchmarking. Not globally reachable.</summary>
public static bool IsRFC2544(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return(address.IsIPv4() && (
bytes[15 - 3] == 198 && (bytes[15 - 2] & 254) == 18));
}
/// <summary>192.175.48.0/24 Direct Delegation AS112 Service. Globally reachable. Not globally unique.</summary>
public static bool IsRFC7534(this IPAddress address)
{
address = address.EnsureIPv6();
var bytes = address.GetAddressBytes();
return(address.IsIPv4() && bytes[15 - 3] == 192 && bytes[15 - 2] == 175 && bytes[15 - 1] == 48);
}
/// <summary>100.64.0.0/10 Shared Address Space. Not globally reachable.</summary>
public static bool IsRFC6598(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return(address.IsIPv4() && (
bytes[15 - 3] == 100 && (bytes[15 - 2] & 0xc0) == 64));
}
public static bool IsRFC1918(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return(address.IsIPv4() && (
bytes[15 - 3] == 10 ||
(bytes[15 - 3] == 192 && bytes[15 - 2] == 168) ||
(bytes[15 - 3] == 172 && (bytes[15 - 2] >= 16 && bytes[15 - 2] <= 31))));
}
/// <summary>192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24 Documentation. Not globally reachable.</summary>
public static bool IsRFC5737(this IPAddress address)
{
address = address.EnsureIPv6();
byte[] bytes = address.GetAddressBytes();
return(address.IsIPv4() && (
(bytes[15 - 3] == 192 && bytes[15 - 2] == 0 && bytes[15 - 1] == 2) ||
(bytes[15 - 3] == 198 && bytes[15 - 2] == 51 && bytes[15 - 1] == 100) ||
(bytes[15 - 3] == 203 && bytes[15 - 2] == 0 && bytes[15 - 1] == 113)));
}
public static bool IsLocal(this IPAddress address)
{
address = address.EnsureIPv6();
var bytes = address.GetAddressBytes();
// IPv4 loopback
if (address.IsIPv4() && (bytes[15 - 3] == 127 || bytes[15 - 3] == 0))
{
return(true);
}
// IPv6 loopback (::1/128)
if ((Utils.ArrayEqual(bytes, 0, pchLocal, 0, 16) ? 0 : 1) == 0)
{
return(true);
}
return(false);
}
public static byte[] GetGroup(this IPAddress address)
{
List <byte> vchRet = new List <byte>();
int nClass = 2;
int nStartByte = 0;
int nBits = 16;
address = address.EnsureIPv6();
var bytes = address.GetAddressBytes();
// all local addresses belong to the same group
if (address.IsLocal())
{
nClass = 255;
nBits = 0;
}
// all unroutable addresses belong to the same group
if (!address.IsRoutable(true))
{
nClass = 0;
nBits = 0;
}
// for IPv4 addresses, '1' + the 16 higher-order bits of the IP
// includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
else if (address.IsIPv4() || address.IsRFC6145() || address.IsRFC6052())
{
nClass = 1;
nStartByte = 12;
}
// for 6to4 tunnelled addresses, use the encapsulated IPv4 address
else if (address.IsRFC3964())
{
nClass = 1;
nStartByte = 2;
}
// for Teredo-tunnelled IPv6 addresses, use the encapsulated IPv4 address
else if (address.IsRFC4380())
{
vchRet.Add(1);
vchRet.Add((byte)(bytes[15 - 3] ^ 0xFF));
vchRet.Add((byte)(bytes[15 - 2] ^ 0xFF));
return(vchRet.ToArray());
}
else if (address.IsTor())
{
nClass = 3;
nStartByte = 6;
nBits = 4;
}
// for he.net, use /36 groups
else if (bytes[15 - 15] == 0x20 && bytes[15 - 14] == 0x01 && bytes[15 - 13] == 0x04 && bytes[15 - 12] == 0x70)
{
nBits = 36;
}
// for the rest of the IPv6 network, use /32 groups
else
{
nBits = 32;
}
vchRet.Add((byte)nClass);
while (nBits >= 8)
{
vchRet.Add(bytes[15 - (15 - nStartByte)]);
nStartByte++;
nBits -= 8;
}
if (nBits > 0)
{
vchRet.Add((byte)(bytes[15 - (15 - nStartByte)] | ((1 << nBits) - 1)));
}
return(vchRet.ToArray());
}
public NetworkPeer FindByIp(IPAddress ip)
{
ip = ip.EnsureIPv6();
return(this.networkPeers.Where(n => Match(ip, null, n.Key)).Select(s => s.Key).FirstOrDefault());
}
public INetworkPeer FindByIp(IPAddress ip)
{
ip = ip.EnsureIPv6();
return(this.networkPeers.FirstOrDefault(n => Match(ip, null, n)));
}
public Node FindByIp(IPAddress ip)
{
ip = ip.EnsureIPv6();
return(_nodes.Where(n => Match(ip, null, n.Key)).Select(s => s.Key).FirstOrDefault());
}
public List <INetworkPeer> FindByIp(IPAddress ip)
{
ip = ip.EnsureIPv6();
return(this.networkPeers.Where(n => Match(ip, null, n)).ToList());
}
public List <INetworkPeer> FindByIp(IPAddress ip)
{
ip = ip.EnsureIPv6();
return(this.networkPeers.Where(n => n.MatchRemoteIPAddress(ip)).ToList());
}