/// <summary>
/// Create DfsReferralRequest packet
/// </summary>
/// <param name="maxReferralLevel">
/// A 16-bit integer that indicates the highest DFS referral version understood by the client.
/// </param>
/// <param name="fileName">
/// Specifies the UNC path or zero length string to be resolved.
/// This parameter should not be null-terminated. parameter length precedes parameter in structure to indicate bounds.
///
/// </param>
/// <param name="flag">
/// A 16 bit integer which indicates if client site name has been provided.
/// "0x1": Site name included, "0x0": Site name is not included.
/// </param>
/// <param name="siteName">
/// A string which specifies the client computer's Active Directory Domain Service site name.
/// This parameter should not be null-terminated. parameter length precedes parameter in structure to indicate bounds.
/// </param>
/// <exception cref="ArgumentException">fileName is not a valid string for DFS referral</exception>
///
public DfscReferralRequestEXPacket CreateDfscReferralRequestPacketEX(ushort maxReferralLevel, string fileName,
REQ_GET_DFS_REFERRAL_RequestFlags flag, string siteName = null)
{
/* Remove first backslash from fileName
* To create valid string for the RequestFileName field of the REQ_DFS_REFERRAL_EX structure
* Example:
* "\\contoso.com\share\filepath" becomes "\contoso.com\share\filepath"
*/
if (fileName.Length > 0 && fileName.StartsWith(@"\\"))
{
fileName = fileName.Substring(1);
}
fileName += '\0';
//Build REQ_DFS_REFERRAL_EX structure
REQ_GET_DFS_REFERRAL_EX DFSRequestEX = new REQ_GET_DFS_REFERRAL_EX();
DFSRequestEX.MaxReferralLevel = maxReferralLevel;
DFSRequestEX.RequestFlags = flag;
REQ_GET_DFS_REFERRAL_RequestData requestData = new REQ_GET_DFS_REFERRAL_RequestData();
requestData.RequestFileName = Encoding.Unicode.GetBytes(fileName);
requestData.RequestFileNameLength = (ushort)requestData.RequestFileName.Length;
DFSRequestEX.RequestDataLength = (uint)(requestData.RequestFileNameLength + 2);
if (DFSRequestEX.RequestFlags == REQ_GET_DFS_REFERRAL_RequestFlags.SiteName)
{
if (siteName == null)
{
throw new ArgumentNullException("siteName is null when flag is set");
}
requestData.SiteName = Encoding.Unicode.GetBytes(siteName);
requestData.SiteNameLength = (ushort)requestData.SiteName.Length;
DFSRequestEX.RequestDataLength += (uint)(requestData.SiteNameLength + 2);
}
DFSRequestEX.RequestData = requestData;
//Build REQ_GET_DFS_REFERRAL_EX packet
DfscReferralRequestEXPacket packet = new DfscReferralRequestEXPacket();
packet.ReferralRequest = DFSRequestEX;
return(packet);
}
/// <summary>
/// Encode the packet to the specified transport protocol's payload. Then Send the request to server.
/// </summary>
/// <param name="packet">
/// The REQ_GET_DFS_REFERRAL packet to be sent.
/// </param>
/// <param name="EXpacket">
/// The REQ_GET_DFS_REFERRAL_EX packet to be sent.
/// MUST be null if transport is not SMB2 or SMB3
/// </param>
/// <exception cref="System.ArgumentNullException">The packet to be sent is null.</exception>
/// <exception cref="System.InvalidOperationException">The transport is not connected.</exception>
public void SendPacket(DfscReferralRequestEXPacket EXpacket = null, DfscReferralRequestPacket packet = null)
{
if (packet == null && EXpacket == null)
{
throw new ArgumentNullException("packet is null");
}
else if (packet == null)
{
this.transport.SendDfscPayload(EXpacket.ToBytes(), true);
}
else
{
this.transport.SendDfscPayload(packet.ToBytes(), false);
}
}
/// <summary>
/// Sends a REQ_GET_DFS_REFERRAL or REQ_GET_DFS_REFERRAL_EX to the server and captures the RESP_GET_DFS_REFERRAL response.
/// </summary>
/// <param name="packetEX">Optional REQ_GET_DFS_REFERRAL_EX packet to be sent to the server</param>
/// <param name="packet">Optional REQ_GET_DFS_REFERRAL packet to be sent to the server</param>
/// <exception cref="ArgumentNullException">There must be one non null request packet.</exception>
/// <returns></returns>
public DfscReferralResponsePacket SendAndRecieveDFSCReferralMessages(out uint status, TimeSpan timeout, DfscReferralRequestEXPacket packetEX = null, DfscReferralRequestPacket packet = null)
{
SendPacket(packetEX, packet);
return(ExpectPacket(timeout, out status));
}