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jbe2277/DiscoveryService.cs

Last active September 4, 2021 10:50
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[Xamarin, MAUI] Parse IPAddress provided by iOS NetServiceBrowser (supports IPv4 and IPv6)
Raw
DiscoveryService.cs
private void ServiceAddressResolved(object sender, EventArgs e)
{
var service = (NSNetService)sender;
var addresses = service.Addresses.Select(x => x.ToArray()).ToArray();
var ipAddress = GetIPAddress(addresses.First()); // Consider that resolve might provide multiple IP addresses
// ...
}
private static IPAddress? GetIPAddress(byte[] data)
{
const int ipV4AddressSize = 16;
const int ipV6AddressSize = 28;
if (data.Length != ipV4AddressSize && data.Length != ipV6AddressSize) return null;
bool isIPv4 = data.Length == ipV4AddressSize;
var socketAddress = new SocketAddress(isIPv4 ? AddressFamily.InterNetwork : AddressFamily.InterNetworkV6, data.Length);
for (int i = 2; i < data.Length; i++) socketAddress[i] = data[i]; // First 2 bytes are reserved for AddressFamily
var ep = new IPEndPoint(isIPv4 ? IPAddress.Any : IPAddress.IPv6Any, 0);
return ((IPEndPoint)ep.Create(socketAddress)).Address;
}
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