/// <summary>
/// Builds a new port address given a HostAddress and a socket.
/// </summary>
/// <param name="address"></param>
/// <param name="socket"></param>
public PUPPort(HostAddress address, UInt32 socket)
{
Network = address.Network;
Host = address.Host;
Socket = socket;
}
private void LoadHostTable()
{
_hostAddressTable = new Dictionary <byte, Dictionary <byte, string> >();
_hostNameTable = new Dictionary <string, HostAddress>();
using (StreamReader sr = new StreamReader(Path.Combine("Conf", "hosts.txt")))
{
int lineNumber = 0;
while (!sr.EndOfStream)
{
lineNumber++;
//
// A line is either:
// '#' followed by comment to EOL
// <inter-network name> <hostname>
// Any whitespace is ignored
//
// Format for Inter-Network name expressions is either:
// network#host# (to specify hosts on another network)
// or
// host# (to specify hosts on our network)
//
string line = sr.ReadLine().Trim().ToLowerInvariant();
if (line.StartsWith("#") || String.IsNullOrWhiteSpace(line))
{
// Comment or empty, just ignore
continue;
}
// Tokenize on whitespace
string[] tokens = line.Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
// We need at least two tokens (inter-network name and one hostname)
if (tokens.Length < 2)
{
// Log warning and continue.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Invalid syntax.", lineNumber);
continue;
}
// First token should be an inter-network name, which should end with '#'.
if (!tokens[0].EndsWith("#"))
{
// Log warning and continue.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Improperly formed inter-network name '{1}'.", lineNumber, tokens[0]);
continue;
}
// tokenize on '#'
string[] networkTokens = tokens[0].Split(new char[] { '#' }, StringSplitOptions.RemoveEmptyEntries);
HostAddress host = new HostAddress(0, 0);
// 1 token means a local name, 2 means on other network, anything else is illegal
if (networkTokens.Length == 1)
{
try
{
host.Host = Convert.ToByte(networkTokens[0], 8);
host.Network = _localHost.Network;
}
catch
{
// Log warning and continue.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Invalid host number in inter-network address '{1}'.", lineNumber, tokens[0]);
continue;
}
}
else if (networkTokens.Length == 2)
{
try
{
host.Network = Convert.ToByte(networkTokens[0], 8);
host.Host = Convert.ToByte(networkTokens[1], 8);
}
catch
{
// Log warning and continue.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Invalid host or network number in inter-network address '{1}'.", lineNumber, tokens[0]);
continue;
}
}
else
{
// Log warning and continue.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Improperly formed inter-network name '{1}'.", lineNumber, tokens[0]);
continue;
}
// Hash the host by one or more names
for (int i = 1; i < tokens.Length; i++)
{
string hostName = tokens[i];
// Add to name table
if (_hostNameTable.ContainsKey(hostName))
{
// Duplicate name entry! Skip this line.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Duplicate hostname '{1}'.", lineNumber, hostName);
break;
}
_hostNameTable.Add(hostName, host);
// Add to address table:
// - See if network has entry
Dictionary <byte, string> networkTable = null;
if (_hostAddressTable.ContainsKey(host.Network))
{
networkTable = _hostAddressTable[host.Network];
}
else
{
// No entry for this network yet, add it now
networkTable = new Dictionary <byte, string>();
_hostAddressTable.Add(host.Network, networkTable);
}
// Add to network table
if (networkTable.ContainsKey(host.Host))
{
// Duplicate host entry! Skip this line.
Log.Write(LogType.Warning, LogComponent.DirectoryServices,
"hosts.txt line {0}: Duplicate host ID '{1}'.", lineNumber, host.Host);
break;
}
networkTable.Add(host.Host, hostName);
}
}
}
}
