private static string ParseEndPoint(string text)
{
var ipv4port = System.Text.RegularExpressions.Regex.Match(text, @"\A(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}):(\d{1,5})\z");
var ipv6port = System.Text.RegularExpressions.Regex.Match(text, @"\A\[([a-fA-F0-9:]+)\]:(\d{1,5})\z");
var hostport = System.Text.RegularExpressions.Regex.Match(text, @"\A([a-zA-Z](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?)*):(\d{1,5})\z");
var ipv4addr = System.Text.RegularExpressions.Regex.Match(text, @"\A(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\z");
var ipv6addr = System.Text.RegularExpressions.Regex.Match(text, @"\A([a-fA-F0-9:.]+)\z");
var hostaddr = System.Text.RegularExpressions.Regex.Match(text, @"\A([a-zA-Z](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?)*)\z");
if (ipv4port.Success) {
IPAddress addr;
int port;
if (IPAddress.TryParse(ipv4port.Groups[1].Value, out addr) &&
addr.AddressFamily==System.Net.Sockets.AddressFamily.InterNetwork &&
Int32.TryParse(ipv4port.Groups[2].Value, out port) &&
0<port && port<=65535) {
return new IPEndPoint(addr, port).ToString();
}
}
if (ipv6port.Success) {
IPAddress addr;
int port;
if (IPAddress.TryParse(ipv6port.Groups[1].Value, out addr) &&
addr.AddressFamily==System.Net.Sockets.AddressFamily.InterNetworkV6 &&
Int32.TryParse(ipv6port.Groups[2].Value, out port) &&
0<port && port<=65535) {
return new IPEndPoint(addr, port).ToString();
}
}
if (hostport.Success) {
string host = hostport.Groups[1].Value;
int port;
if (Int32.TryParse(hostport.Groups[2].Value, out port) && 0<port && port<=65535) {
return String.Format("{0}:{1}", host, port);
}
}
if (ipv4addr.Success) {
IPAddress addr;
if (IPAddress.TryParse(ipv4addr.Groups[1].Value, out addr) &&
addr.AddressFamily==System.Net.Sockets.AddressFamily.InterNetwork) {
return addr.ToString();
}
}
if (ipv6addr.Success) {
IPAddress addr;
if (IPAddress.TryParse(ipv6addr.Groups[1].Value, out addr) &&
addr.AddressFamily==System.Net.Sockets.AddressFamily.InterNetworkV6) {
return addr.ToString();
}
}
if (hostaddr.Success) {
string host = hostaddr.Groups[1].Value;
return host;
}
return null;
}
