public IPAddress[] ResolveHost()
{
var entry = _entry;
if (entry == null || entry.Expired)
{
entry = _entry = GetEntry(Host);
}
return((entry == null) ? EmptyAddresses :
(entry.IPAddresses ?? EmptyAddresses));
}
/// <summary>
/// Get ip address entry from the database
/// </summary>
/// <param name="ipAddress">IP address to lookup</param>
/// <param name="entry">IP address entry or default if not found</param>
/// <returns>True if ip address found, false if not</returns>
public bool TryGetIPAddress(string ipAddress, out IPAddressEntry entry, object transaction = null)
{
if (IPAddress.TryParse(ipAddress, out IPAddress ipAddressObj))
{
byte[] ipBytes = ipAddressObj.GetAddressBytes();
IPBanDBTransaction tran = transaction as IPBanDBTransaction;
using (SqliteDataReader reader = ExecuteReader("SELECT IPAddressText, LastFailedLogin, FailedLoginCount, BanDate, State, BanEndDate FROM IPAddresses WHERE IPAddress = @Param0",
tran?.DBConnection, tran?.DBTransaction, ipBytes))
{
if (reader.Read())
{
entry = ParseIPAddressEntry(reader);
return(true);
}
}
}
entry = null;
return(false);
}
/// <summary>
/// Get ip address entry from the database
/// </summary>
/// <param name="ipAddress">IP address to lookup</param>
/// <param name="entry">IP address entry or default if not found</param>
/// <returns>True if ip address found, false if not</returns>
public bool TryGetIPAddress(string ipAddress, out IPAddressEntry entry, object transaction = null)
{
if (IPAddress.TryParse(ipAddress, out IPAddress ipAddressObj))
{
ipAddressObj = ipAddressObj.Clean();
byte[] ipBytes = ipAddressObj.GetAddressBytes();
SqliteDBTransaction tran = transaction as SqliteDBTransaction;
using SqliteDataReader reader = ExecuteReader("SELECT IPAddressText, LastFailedLogin, FailedLoginCount, BanDate," +
"State, BanEndDate, UserName, Source FROM IPAddresses WHERE IPAddress = @Param0",
tran?.DBConnection, tran?.DBTransaction, ipBytes);
if (reader.Read())
{
entry = ParseIPAddressEntry(reader);
return true;
}
}
entry = null;
return false;
}
private static IPAddressEntry GetEntry(string host)
{
if (host.IsEmpty())
{
return(null);
}
if (s_DnsEntries.TryGetValue(host, out IPAddressEntry entry) && !entry.Expired)
{
return(entry);
}
lock (((ICollection)s_DnsEntries).SyncRoot)
{
if (s_DnsEntries.TryGetValue(host, out entry) && !entry.Expired)
{
return(entry);
}
var isIp = false;
IPAddress[] ipAddresses = null;
if (host.Equals(NetConstants.LocalHost, StringComparison.OrdinalIgnoreCase))
{
if (Socket.OSSupportsIPv4)
{
isIp = true;
ipAddresses = new[] { IPAddress.Parse(NetConstants.IP4Loopback) };
}
else if (Socket.OSSupportsIPv6)
{
isIp = true;
ipAddresses = new[] { IPAddress.Parse(NetConstants.IP6Loopback) };
}
}
if (!isIp)
{
isIp = IPAddress.TryParse(host, out IPAddress ipAddress);
ipAddresses = isIp ? new[] { ipAddress } :
NetAsyncEx.GetHostAddressesAsync(host).Result;
if (!ipAddresses.IsEmpty())
{
isIp = isIp ||
ipAddresses.All(ip => IPAddress.IsLoopback(ip) || LocalIPs.Contains(ip));
if (ipAddresses.Length > 1)
{
ipAddresses = ipAddresses
.OrderBy((addr) =>
{ return(addr.AddressFamily == AddressFamily.InterNetwork ? -1 : 1); })
.ToArray();
}
}
}
if (entry != null)
{
entry.SetIPAddresses(ipAddresses ?? EmptyAddresses, isIp);
}
else
{
s_DnsEntries[host] = entry = new IPAddressEntry(host, ipAddresses ?? EmptyAddresses, isIp);
}
}
return(entry);
}