internal IDictionary <NetworkAddress, NetworkAddress> CreateMapFromConfiguration()
{
var addresses = new Dictionary <NetworkAddress, NetworkAddress>();
foreach (var configurationAddressString in _configurationAddresses)
{
if (!NetworkAddress.TryParse(configurationAddressString, out var configurationAddress))
{
throw new FormatException($"The string \"{configurationAddressString}\" does not represent a valid network address.");
}
// got to be v6 - cannot get IPAddress to parse anything that would not be v4 or v6
//if (!address.IsIpV6)
// throw new NotSupportedException($"Address family {address.IPAddress.AddressFamily} is not supported.");
// see https://4sysops.com/archives/ipv6-tutorial-part-6-site-local-addresses-and-link-local-addresses/
// loopback - is ::1 exclusively
// site-local - equivalent to private IP addresses in v4 = fe:c0:...
// link-local - hosts on the link
// global - globally route-able addresses
IEnumerable <NetworkAddress> networkAddresses;
if (configurationAddress.IsIpV4 || configurationAddress.IsIpV6GlobalOrScoped)
{
// v4, or v6 global or has a scope = qualified, can return
networkAddresses = ExpandPorts(configurationAddress);
}
else
{
// address is v6 site-local or link-local, and has no scopeId
// get localhost addresses
networkAddresses = GetV6LocalAddresses()
.SelectMany(x => ExpandPorts(configurationAddress, x));
}
foreach (var networkAddress in networkAddresses)
{
addresses.Add(networkAddress, networkAddress);
}
}
return(addresses);
}
private IDictionary <NetworkAddress, NetworkAddress> CreateMapFromConfiguration()
{
var addresses = new Dictionary <NetworkAddress, NetworkAddress>();
foreach (var configurationAddress in _configurationAddresses)
{
if (!NetworkAddress.TryParse(configurationAddress, out IEnumerable <NetworkAddress> networkAddresses))
{
throw new FormatException($"The string \"{configurationAddress}\" does not represent a valid network address.");
}
foreach (var networkAddress in networkAddresses)
{
addresses.Add(networkAddress, networkAddress);
}
}
return(addresses);
}
private static Dictionary <NetworkAddress, NetworkAddress> ParseResponse(string jsonResult)
{
var regexPrivate = new Regex(RegexPrivateStr, RegexOptions.Compiled | RegexOptions.IgnoreCase);
var regexPublic = new Regex(RegexPublicStr, RegexOptions.Compiled | RegexOptions.IgnoreCase);
var matchesPrivate = regexPrivate.Matches(jsonResult);
var matchesPublic = regexPublic.Matches(jsonResult);
var privateToPublicAddresses = new Dictionary <NetworkAddress, NetworkAddress>();
for (var i = 0; i < matchesPrivate.Count; i++)
{
var privateAddressStr = matchesPrivate[i].Value;
var publicAddressStr = matchesPublic[i].Value;
var publicAddress = NetworkAddress.Parse(publicAddressStr);
privateToPublicAddresses.Add(new NetworkAddress(privateAddressStr, publicAddress.Port), publicAddress);
}
return(privateToPublicAddresses);
}
internal IEnumerable <NetworkAddress> ExpandPorts(NetworkAddress address, IPAddress ipAddress = null)
{
if (address.Port > 0)
{
// qualified with a port = can only be this address
yield return(address);
}
else
{
// not qualified with a port = can be a port range
for (var port = _networkingOptions.DefaultPort;
port < _networkingOptions.DefaultPort + _networkingOptions.PortRange;
port++)
{
yield return(ipAddress == null
? new NetworkAddress(address, port)
: new NetworkAddress(address.HostName, ipAddress, port));
}
}
}
/// <summary>
/// Maps a private address to a public address.
/// </summary>
/// <param name="address">The private address.</param>
/// <returns>The public address, or null if no address was found.</returns>
public NetworkAddress Map(NetworkAddress address)
{
if (address == null || !_isMapping)
{
return(address);
}
var fresh = false;
if (_privateToPublic == null)
{
_privateToPublic = _createMap() ?? throw new HazelcastException("Failed to obtain an address map.");
fresh = true;
}
// if we can map, return
if (_privateToPublic.TryGetValue(address, out var publicAddress))
{
return(publicAddress);
}
// if the map is not 'fresh' recreate the map and try again, else give up
// TODO: throttle?
if (fresh)
{
return(null);
}
_privateToPublic = _createMap();
if (_privateToPublic == null)
{
throw new HazelcastException("Failed to obtain an address map.");
}
return(_privateToPublic.TryGetValue(address, out publicAddress) ? publicAddress : null);
}
/// <summary>
/// Tries to parse a string into a <see cref="NetworkAddress"/> instance.
/// </summary>
/// <param name="s">The string.</param>
/// <param name="address">The network address.</param>
/// <param name="defaultPort">The default port.</param>
/// <returns>Whether the string could be parsed into an address.</returns>
private static bool TryParse(string s, out NetworkAddress address, int defaultPort)
{
address = null;
var span = s.AsSpan();
var colon1 = span.IndexOf(':');
var colon2 = span.LastIndexOf(':');
var brket1 = span.IndexOf('[');
var brket2 = span.IndexOf(']');
var port = defaultPort;
// opening bracket must be first
if (brket1 > 0)
{
return(false);
}
// must have both brackets, or none
if (brket1 == 0 != brket2 >= 0)
{
return(false);
}
// brackets => colon if any *must* be right after closing bracket
if (brket1 == 0 && colon2 > brket2 + 1)
{
return(false);
}
// no bracket and single colon, or one colon after brackets
// => parse port
if ((brket2 < 0 && colon2 > 0 && colon1 == colon2) ||
(brket2 > 0 && colon2 > brket2))
{
#if NETSTANDARD2_0
if (!int.TryParse(span.Slice(colon2 + 1).ToString(), out port))
{
return(false);
}
#endif
#if NETSTANDARD2_1
if (!int.TryParse(span.Slice(colon2 + 1), out port))
{
return(false);
}
#endif
}
ReadOnlySpan <char> hostName;
#pragma warning disable IDE0057 // Slice can be simplified
if (brket1 == 0)
{
// if we have brackets, they must contain colons
if (colon2 < 0 || colon1 > brket2)
{
return(false);
}
// hostname is in-between brackets
// (and has to be parseable as an ip address)
hostName = span.Slice(1, brket2 - 1);
}
else
{
// one single colon = hostname is whatever is before
// otherwise, hostname is the whole string
hostName = (colon2 > 0 && colon1 == colon2) ? span.Slice(0, colon2) : span;
}
#pragma warning restore IDE0057 // Slice can be simplified
// must have a hostname - look at the code above, hostname cannot be empty here
//if (hostName.Length == 0)
// return false;
// note that in IPv6 case, hostname can contain a % followed by a scope id
// which is fine, IPAddress.TryParse handles it
string hostNameString;
#if NET462 || NETSTANDARD2_0
if (IPAddress.TryParse(hostName.ToString(), out var ipAddress))
#endif
#if NETSTANDARD2_1
if (IPAddress.TryParse(hostName, out var ipAddress))
#endif
{
// if the hostname parses to an ip address, fine
hostNameString = ipAddress.ToString();
}
else
{
// if we have brackets, hostname must be parseable
if (brket1 == 0)
{
return(false);
}
hostNameString = hostName.ToString();
// else, try to get the ip via DNS
try
{
ipAddress = GetIPAddressByName(hostNameString);
}
catch
{
return(false);
}
}
address = new NetworkAddress(hostNameString, ipAddress, port);
return(true);
}
/// <summary> /// Tries to parse a string into a <see cref="NetworkAddress"/> instance. /// </summary> /// <param name="s">The string.</param> /// <param name="address">The network address.</param> /// <returns>Whether the string could be parsed into an address.</returns> public static bool TryParse(string s, out NetworkAddress address) => TryParse(s, out address, DefaultPort);