/// <summary>
/// Probes the given device (IP Address)
/// </summary>
/// <param name="deviceAddress">IP Address of the device to probe</param>
/// <returns>Returns Device information if it is discovered else returns null</returns>
public static DeviceInfo ProbeDevice(IPAddress deviceAddress)
{
Collection <DeviceInfo> devices = new Collection <DeviceInfo>();
string probeMessage = GetProbeXmlString();
// local machine may have many network interfaces
// walk thru each network interface and probe the devices
IPHostEntry receiverHost = Dns.GetHostEntry(Dns.GetHostName());
for (int interfaceIndex = 0; interfaceIndex < receiverHost.AddressList.Length; interfaceIndex++)
{
Collection <string> probeMatches = DiscoveryBase.ProbeDevice(receiverHost.AddressList[interfaceIndex], deviceAddress, probeMessage, PROBE_PORT);
ConvertProbeMatchToDeviceInfo(probeMatches, devices);
}
// since we are probing to a specific device it should get only one device
if (devices.Count <= 0)
{
return(null);
}
else
{
return(devices[0]);
}
}
/// <summary>
/// Discovers WS enabled devices in the network.
/// Note: This method will not support in threading.
/// <param name="ipv4NetworkPrefix">Network prefix to discover only in the given prefix eg: 192.168.201</param>
/// <param name="discoverOnIPv6">Discover on IPv6 also</param>
/// </summary>
/// <returns>Returns the list of devices found in the network</returns>
public static Collection <DeviceInfo> Discover(string ipv4NetworkPrefix = null, bool discoverOnIPv6 = true)
{
Collection <DeviceInfo> devices = new Collection <DeviceInfo>();
// local machine may have many network interfaces
// walk thru each network interface and probe the devices
IPHostEntry receiverHost = Dns.GetHostEntry(Dns.GetHostName());
string probeMessage = GetProbeXmlString();
Collection <string> probeMatches;
for (int interfaceIndex = 0; interfaceIndex < receiverHost.AddressList.Length; interfaceIndex++)
{
IPAddress clientAddress = receiverHost.AddressList[interfaceIndex];
// if the subnet mask is null discover always
if (ipv4NetworkPrefix == null || string.IsNullOrEmpty(ipv4NetworkPrefix))
{
// if it is null discover
IPAddress ipv4Address = IPAddress.Parse(MULTICAST_PROBE_IPv4);
probeMatches = DiscoveryBase.ProbeDevice(clientAddress, ipv4Address, probeMessage, PROBE_PORT);
ConvertProbeMatchToDeviceInfo(probeMatches, devices);
}
else
{
if (clientAddress.ToString().StartsWith(ipv4NetworkPrefix, StringComparison.InvariantCultureIgnoreCase))
{
IPAddress ipv4Address = IPAddress.Parse(MULTICAST_PROBE_IPv4);
probeMatches = DiscoveryBase.ProbeDevice(clientAddress, ipv4Address, probeMessage, PROBE_PORT);
ConvertProbeMatchToDeviceInfo(probeMatches, devices);
}
}
if (discoverOnIPv6)
{
// Discovering on IPv6
IPAddress ipv6Address = IPAddress.Parse(MULTICAST_PROBE_IPv6);
probeMatches = DiscoveryBase.ProbeDevice(receiverHost.AddressList[interfaceIndex], ipv6Address, probeMessage, PROBE_PORT);
ConvertProbeMatchToDeviceInfo(probeMatches, devices);
}
}
return(devices);
}
