public IPv4Packet(string sourceMAC, string destMAC, IPv4Address sourceIP, IPv4Address destIP, string content = "")
{
SourceMAC = sourceMAC;
DestMAC = destMAC;
SourceIP = sourceIP;
DestIP = destIP;
Content = content;
}
public Route(Subnet subnet, RouterPort routerPort, IPv4Address gateway = null, IPv4Address src = null)
{
this.gateway = gateway;
this.Subnet = subnet;
this.RouterPort = routerPort;
this.src = src;
if (src != null && gateway != null)
{
throw new ArgumentException("Can't have source and gateway simultaneously");
}
}
public SubnetMatchResult Match(IPv4Address otherIpv4Address)
{
byte[] srcIp = otherIpv4Address.GetBytes();
byte[] netaddr = GetNetAddress().GetBytes();
byte[] maskBytes = MaskToBytes(Mask);
byte[] result = new byte[4];
for (int a = 0; a < srcIp.Length; a++)
{
result[a] = (byte)(srcIp[a] & maskBytes[a]);
}
return(new SubnetMatchResult(Helper.Equals(netaddr, result), this, otherIpv4Address));
}
public IPv4Address GetBroadcast()
{
if (broadcastAddr == null)
{
byte[] broadcastAddrBytes = GetNetAddress().GetBytes();
byte[] invertedMask = InvertedMask(Mask);
for (int a = 0; a < 4; a++)
{
broadcastAddrBytes[a] = (byte)(broadcastAddrBytes[a] | invertedMask[a]);
}
broadcastAddr = new IPv4Address(new System.Net.IPAddress(broadcastAddrBytes));
}
return(broadcastAddr);
}
public IPv4Address GetNetAddress()
{
if (netAddress == null)
{
byte[] addr = IpAddress.GetBytes();
byte[] maskBytes = MaskToBytes(Mask);
byte[] result = new byte[4];
for (int a = 0; a < addr.Length; a++)
{
result[a] = (byte)(addr[a] & maskBytes[a]);
}
netAddress = new IPv4Address(new System.Net.IPAddress(result));
}
return(netAddress);
}
public Subnet GenerateNewWithLowestBitWithinMaskIncreased()
{
byte[] maskBytes = new byte[4];
int maskRest = Mask;
int count = 0;
while (maskRest > 0)
{
if (maskRest == 1)
{
maskBytes[count / 8] += (byte)(0x80 >> ((byte)count % 8));
}
maskRest--;
count++;
}
byte[] addr = IpAddress.GetBytes();
byte[] result = new byte[4];
for (int a = 0; a < addr.Length; a++)
{
result[a] = (byte)(addr[a] | maskBytes[a]);
}
netAddress = new IPv4Address(new System.Net.IPAddress(result));
return(new Subnet(netAddress, Mask));
}
public SubnetMatchResult(bool isMatch, Subnet subnet, IPv4Address ipAddress)
{
IsMatch = isMatch;
Subnet = subnet;
IpAddress = ipAddress;
}
public Subnet(string ipAddress, int mask)
{
IpAddress = new IPv4Address(ipAddress);
Mask = mask;
}
public Subnet(IPv4Address ipAddress, int mask)
{
IpAddress = ipAddress;
Mask = mask;
}
