Ejemplo n.º 1
0
        /// <summary>
        /// Retrieves the IP address of the current request -- handles proxies and private networks.
        /// </summary>
        /// <param name="serverVariables">The server variables collection to extract the IP from.</param>
        public static string GetRemoteIP(this NameValueCollection serverVariables)
        {
            var ip           = serverVariables["REMOTE_ADDR"]; // could be a proxy -- beware
            var forwardedFor = serverVariables["HTTP_X_FORWARDED_FOR"] ?? "";

            var remoteIPs = forwardedFor.Split(_commaSpace, StringSplitOptions.RemoveEmptyEntries);

            // Loop from the end until we get the first IP that's *not* internal:
            for (var i = remoteIPs.Length - 1; i >= 0; i--)
            {
                var remoteIp = remoteIPs[i];
                // Nothing? Toss it.
                if (remoteIp == null)
                {
                    continue;
                }
                // Not valid? Toss it.
                if (!IPNet.TryParse(remoteIp, out IPNet remoteIpNet))
                {
                    continue;
                }
                // Usual prod behavior: Never match a private address, unless it's the last.
                // Get the first IP outside current networks.
                // Take the first external IP we match, or the last IP we match - e.g. from another web server
                if (!remoteIpNet.IsPrivate || i == 0)
                {
                    ip = remoteIp;
                    break;
                }
            }

            return(ip.HasValue() ? ip : UnknownIP);
        }
Ejemplo n.º 2
0
 public bool Contains(IPNet network)
 {
     return(network != null &&
            AddressFamily == network.AddressFamily &&
            TinyFirstAddressInSubnet <= network.TinyFirstAddressInSubnet &&
            network.TinyLastAddressInSubnet <= TinyLastAddressInSubnet);
     //return (TSubnet & TIPAddress) == (TSubnet & network.TIPAddress & TIPAddress );
 }
Ejemplo n.º 3
0
 public static bool TryParse(string ipOrCidr, out IPNet net)
 {
     try { net = Parse(ipOrCidr); return(true); }
     catch { net = null; return(false); }
 }
Ejemplo n.º 4
0
 public static bool IsPrivateNetwork(IPNet network)
 {
     return(ReservedPrivateRanges.Any(r => r.Contains(network)));
 }