/// <summary>
/// Converts to the bytes.
/// </summary>
/// <returns></returns>
public byte[] ToBytes()
{
return(_discovery.ToBytes());
}
/// <summary>
/// Discovers agents of the specified version in a specific time interval.
/// </summary>
/// <param name="version">The version.</param>
/// <param name="broadcastAddress">The broadcast address.</param>
/// <param name="community">The community.</param>
/// <param name="interval">The discovering time interval, in milliseconds.</param>
/// <remarks><paramref name="broadcastAddress"/> must be an IPv4 address. IPv6 is not yet supported here.</remarks>
public void Discover(VersionCode version, IPEndPoint broadcastAddress, OctetString community, int interval)
{
if (broadcastAddress == null)
{
throw new ArgumentNullException("broadcastAddress");
}
if (version != VersionCode.V3 && community == null)
{
throw new ArgumentNullException("community");
}
var addressFamily = broadcastAddress.AddressFamily;
if (addressFamily == AddressFamily.InterNetworkV6)
{
throw new ArgumentException("IP v6 is not yet supported", "broadcastAddress");
}
byte[] bytes;
_requestId = Messenger.NextRequestId;
if (version == VersionCode.V3)
{
// throw new NotSupportedException("SNMP v3 is not supported");
var discovery = new Discovery(Messenger.NextMessageId, _requestId, Messenger.MaxMessageSize);
bytes = discovery.ToBytes();
}
else
{
var message = new GetRequestMessage(_requestId, version, community, _defaultVariables);
bytes = message.ToBytes();
}
using (var udp = new UdpClient(addressFamily))
{
#if (!CF)
udp.EnableBroadcast = true;
#endif
udp.Send(bytes, bytes.Length, broadcastAddress);
var activeBefore = Interlocked.CompareExchange(ref _active, Active, Inactive);
if (activeBefore == Active)
{
// If already started, we've nothing to do.
return;
}
#if CF
_bufferSize = 8192;
#else
_bufferSize = udp.Client.ReceiveBufferSize;
#endif
#if ASYNC
ThreadPool.QueueUserWorkItem(AsyncBeginReceive);
#else
ThreadPool.QueueUserWorkItem(AsyncReceive, udp.Client);
#endif
Thread.Sleep(interval);
Interlocked.CompareExchange(ref _active, Inactive, Active);
udp.Close();
}
}