//Verify each packet against the ACL
public void VerifyPacket(Packet packet)
{
bool packetPermitted = false;
foreach (Rule tempRule in access_list)
{
if (addrIsMatch(tempRule.source, packet.source, tempRule.mask))
{
//see if rule is for permit or deny
bool access = false;
if (tempRule.permission == "deny")
access = false;
else if (tempRule.permission == "permit")
access = true;
else
throw new Exception("Invalid rule permission - must be \'Permit\' or \'Deny\'");
if (access)
{
packetPermitted = true;
}
else
break;
}
}
Console.WriteLine("Source: " + packet.source + " Destination: " + packet.destination + " Access: " + (packetPermitted ? "Permit" : "Deny"));
}
//read packets from file and return a list of packet objects
static List<Packet> readPackets()
{
string line;
List<Packet> packets = new List<Packet>();
using (StreamReader pack = new StreamReader(@"packets.txt"))
{
while ((line = pack.ReadLine()) != null)
{
string source = line.Substring(0, line.IndexOf(" "));
string destination = line.Substring(line.IndexOf(" "));
Packet tempPacket = new Packet(source, destination);
packets.Add(tempPacket);
}
}
return packets;
}
