public static IPAddress CreateIPAddress(Sockaddr addr)
{
byte[] bytes = null;
switch (addr.sin_family)
{
case (byte)SockAddrFamily.Inet:
byte[] ipv4addr = new byte[4];
ipv4addr[0] = (byte)(addr.sin_addr & 0x000000FF);
ipv4addr[1] = (byte)((addr.sin_addr & 0x0000FF00) >> 8);
ipv4addr[2] = (byte)((addr.sin_addr & 0x00FF0000) >> 16);
ipv4addr[3] = (byte)((addr.sin_addr & 0xFF000000) >> 24);
bytes = ipv4addr;
break;
case (byte)SockAddrFamily.Inet6:
bytes = addr.sin6_addr8;
break;
default:
#if false
Console.WriteLine($"Unknown socket address family {addr.sin_family}");
#endif
bytes = null;
break;
}
return((bytes != null) ? new IPAddress(bytes): null);
}
string GetZeroconfHostKey(NSNetService service)
{
StringBuilder sb = new StringBuilder();
if (service.Addresses != null)
{
foreach (NSData address in service.Addresses)
{
if (address != null)
{
Sockaddr saddr = Sockaddr.CreateSockaddr(address.Bytes);
IPAddress ipAddr = Sockaddr.CreateIPAddress(saddr);
if (ipAddr != null)
{
sb.Append((sb.Length == 0 ? ipAddr.ToString() : $";{ipAddr.ToString()}"));
}
}
else
{
Console.WriteLine($"{nameof(GetZeroconfHostKey)}: Got null entry in NSNetService.Addresses, Service {service?.Name}");
}
}
}
else
{
Console.WriteLine($"{nameof(GetZeroconfHostKey)}: NSNetService.Addresses is null, Service {service?.Name}");
}
return(sb.ToString());
}
ZeroconfHost GetOrCreateZeroconfHost(NSNetService service)
{
ZeroconfHost host;
string hostKey = GetZeroconfHostKey(service);
lock (zeroconfHostDict)
{
if (!zeroconfHostDict.TryGetValue(hostKey, out host))
{
host = new ZeroconfHost();
host.DisplayName = service.Name;
List <string> ipAddrList = new List <string>();
foreach (NSData address in service.Addresses)
{
Sockaddr saddr = Sockaddr.CreateSockaddr(address.Bytes);
IPAddress ipAddr = Sockaddr.CreateIPAddress(saddr);
if (ipAddr != null)
{
ipAddrList.Add(ipAddr.ToString());
}
}
host.IPAddresses = ipAddrList;
host.Id = host.IPAddress;
zeroconfHostDict[hostKey] = host;
}
}
return(host);
}
public static Sockaddr CreateSockaddr(IntPtr bytes)
{
Sockaddr sock = (Sockaddr)Marshal.PtrToStructure(bytes, typeof(Sockaddr));
return(sock);
}
