/// <summary>
/// Gets a <see cref="DirectConnection"/> by its Rendezvous cookie
/// </summary>
/// <returns>The <see cref="DirectConnection"/> that corresponds to the cookie, or null if no corresponding DC is found</returns>
public DirectConnection GetDirectConnectionByCookie(Cookie key, bool removefromcache)
{
DirectConnection retval = null;
foreach (DirectConnection dc in _directconnections)
{
if (dc.Cookie.ToString() == key.ToString())
{
retval = dc;
break;
}
}
if (retval != null && removefromcache)
{
_directconnections.Remove(retval);
}
return(retval);
}
/// <summary>
/// Raises the <see cref="DirectIMSessionCancelled"/> event
/// </summary>
/// <param name="cookie">The rendezvous cookie belonging to the cancelled session</param>
/// <param name="reason">The reason for the cancellation</param>
protected internal void OnDirectIMSessionCancelled(DirectConnection conn, string reason)
{
Connections.RemoveDirectConnection(conn.Cookie);
Messages.SendDirectConnectionCancellation(conn, reason);
if (this.DirectIMSessionCancelled != null)
{
this.DirectIMSessionCancelled(this, conn.Other, conn.Cookie, reason);
}
}
/// <summary>
/// Cancel a direct connection attempt
/// </summary>
public void SendDirectConnectionCancellation(DirectConnection conn, string reason)
{
SNACHeader sh = new SNACHeader();
sh.FamilyServiceID = SNAC_ICBM_FAMILY;
sh.FamilySubtypeID = ICBM_OUTGOING_MESSAGE;
ByteStream stream = new ByteStream();
InsertIcbmHeader(stream, conn.Cookie, 0x0002, conn.Other.ScreenName);
using (ByteStream tlv05 = new ByteStream())
{
tlv05.WriteUshort(RendezvousData.UshortFromType(RendezvousType.Cancel));
tlv05.WriteByteArray(conn.Cookie.ToByteArray());
tlv05.WriteByteArray(CapabilityProcessor.GetCapabilityArray(conn.Capability));
using (TlvBlock tlvs = new TlvBlock())
{
tlvs.WriteUshort(0x000B, 0x0001);
tlvs.WriteString(0x000C, reason, Encoding.ASCII);
tlvs.WriteEmpty(0x0003);
//KSD-SYSTEMS - commented at 02.12.2009 -> Canceling = Send Message only with Cookie
//tlv05.WriteByteArray(tlvs.GetBytes());
}
stream.WriteUshort(0x0005);
stream.WriteUshort((ushort)tlv05.GetByteCount());
stream.WriteByteArray(tlv05.GetBytes());
}
SNACFunctions.BuildFLAP(Marshal.BuildDataPacket(parent, sh, stream));
}
/// <summary>
/// Accept a direct connection attempt
/// </summary>
public void SendDirectConnectionAccept(DirectConnection conn)
{
SNACHeader sh = new SNACHeader();
sh.FamilyServiceID = SNAC_ICBM_FAMILY;
sh.FamilySubtypeID = ICBM_OUTGOING_MESSAGE;
ByteStream stream = new ByteStream();
InsertIcbmHeader(stream, conn.Cookie, 0x0002, conn.Other.ScreenName);
using (ByteStream tlv05 = new ByteStream())
{
tlv05.WriteUshort(RendezvousData.UshortFromType(RendezvousType.Accept));
tlv05.WriteByteArray(conn.Cookie.ToByteArray());
tlv05.WriteByteArray(CapabilityProcessor.GetCapabilityArray(conn.Capability));
tlv05.WriteUint(0x00030000);
stream.WriteUshort(0x0005);
stream.WriteUshort((ushort)tlv05.GetByteCount());
stream.WriteByteArray(tlv05.GetBytes());
}
SNACFunctions.BuildFLAP(Marshal.BuildDataPacket(parent, sh, stream));
}
/// <summary>
/// Sends a direct connection request
/// </summary>
/// <param name="conn">A <see cref="DirectConnection"/> object that will handle the request</param>
public void RequestDirectConnectionInvite(DirectConnection conn)
{
SNACHeader sh = new SNACHeader();
sh.FamilyServiceID = SNAC_ICBM_FAMILY;
sh.FamilySubtypeID = ICBM_OUTGOING_MESSAGE;
ByteStream stream = new ByteStream();
InsertIcbmHeader(stream, conn.Cookie, 0x0002, conn.Other.ScreenName);
using (ByteStream tlv05 = new ByteStream())
{
tlv05.WriteUshort(RendezvousData.UshortFromType(RendezvousType.Invite));
tlv05.WriteByteArray(conn.Cookie.ToByteArray());
tlv05.WriteByteArray(CapabilityProcessor.GetCapabilityArray(conn.Capability));
using (TlvBlock tlvs = new TlvBlock())
{
tlvs.WriteUshort(DC_SEQUENCE_NUMBER, RendezvousData.UshortFromSequence(conn.Sequence));
if (conn.Sequence == RendezvousSequence.DirectOrStage1)
{
tlvs.WriteEmpty(0x000F);
}
if (!String.IsNullOrEmpty(conn.Message))
{
tlvs.WriteString(DC_MESSAGE, conn.Message, Encoding.ASCII);
}
uint ipaddress = 0;
if (conn.Method == DirectConnectionMethod.Proxied)
{
ipaddress = ConvertIPAddress(conn.AOLProxyIP);
}
else
{
ipaddress = ConvertIPAddress(conn.ClientIP);
}
tlvs.WriteUint(DC_PROXY_IP_ADDRESS, ipaddress);
tlvs.WriteUint(DC_PROXY_IP_ADDRESS_COMPLIMENT, ~ipaddress);
if (conn.Sequence == RendezvousSequence.DirectOrStage1)
{
tlvs.WriteUint(DC_CLIENT_IP_ADDRESS, ConvertIPAddress(conn.ClientIP));
}
if (conn.Sequence != RendezvousSequence.Stage3)
{
tlvs.WriteUshort(DC_PORT, (ushort)conn.Port);
tlvs.WriteUshort(DC_PORT_COMPLIMENT, (ushort)(~conn.Port));
}
if (conn.Method == DirectConnectionMethod.Proxied)
{
tlvs.WriteEmpty(DC_USE_PROXY_FLAG);
}
if (conn is FileTransferConnection && conn.Sequence == RendezvousSequence.DirectOrStage1)
{
FileTransferConnection ftc = conn as FileTransferConnection;
using (ByteStream tlv2711 = new ByteStream())
{
tlv2711.WriteUshort((ushort)((ftc.TotalFiles > 1) ? 0x0002 : 0x0001));
tlv2711.WriteUshort((ushort)ftc.TotalFiles);
tlv2711.WriteUint(ftc.TotalFileSize);
tlv2711.WriteString(ftc.FileHeader.Name, Encoding.ASCII);
tlv2711.WriteByte(0x00);
tlvs.WriteByteArray(0x2711, tlv2711.GetBytes());
}
tlvs.WriteString(0x2712, ftc.LocalFileNameEncoding.WebName, Encoding.ASCII);
}
tlv05.WriteByteArray(tlvs.GetBytes());
}
stream.WriteUshort(0x0005);
stream.WriteUshort((ushort)tlv05.GetByteCount());
stream.WriteByteArray(tlv05.GetBytes());
}
// Acknowledgement request
stream.WriteUint(0x00030000);
SNACFunctions.BuildFLAP(Marshal.BuildDataPacket(parent, sh, stream));
}
/// <summary>
/// Sends a direct connection accept
/// </summary>
/// <param name="conn">A <see cref="DirectConnection"/> object that will handle the request</param>
public void RequestDirectConnectionAccept(DirectConnection conn)
{
SNACHeader sh = new SNACHeader();
sh.FamilyServiceID = 4;
sh.FamilySubtypeID = 6;
ByteStream stream = new ByteStream();
MessageManager.InsertIcbmHeader(stream, conn.Cookie, 0x0002, conn.Other.ScreenName);
stream.WriteUshort(0x0005); // Type
stream.WriteUshort(0x001a); // Len
stream.WriteUshort(RendezvousData.UshortFromType(RendezvousType.Accept)); // Command
stream.WriteByteArray(conn.Cookie.ToByteArray());
stream.WriteByteArray(CapabilityProcessor.GetCapabilityArray(conn.Capability));
SNACFunctions.BuildFLAP(Marshal.BuildDataPacket(parent, sh, stream));
}
/// <summary>
/// Performs TLV 0x2711 processing for direct connect (sendfiles, DirectIM) negotiation
/// </summary>
private void ProcessDirectConnectionRequest(DirectConnection conn, ByteStream stream)
{
if (conn.Type == RendezvousType.Accept)
{
// They're accepting, which means we're going to get a connection on the
// listener socket set up in FileTransferManager. Do nothing here
}
else if (conn.Type == RendezvousType.Cancel)
{
DirectConnection cancelled = parent.Connections.GetDirectConnectionByCookie(conn.Cookie);
if (cancelled != null)
{
if (cancelled is FileTransferConnection)
{
(cancelled as FileTransferConnection).CancelFileTransfer(
"Remote user cancelled direct connection");
}
else if (cancelled is DirectIMConnection)
{
parent.OnDirectIMSessionCancelled(cancelled, "Remote user cancelled direct connection");
}
}
return;
}
else if (conn.Type == RendezvousType.Invite)
{
// AIM sends a type 0x0000 when accepting...huh.
if (conn.Sequence == RendezvousSequence.DirectOrStage1)
{
if (stream.HasMoreData && conn is FileTransferConnection)
{
FileTransferConnection ftconn = conn as FileTransferConnection;
ftconn.SubType = stream.ReadUshort();
ftconn.TotalFiles = stream.ReadUshort();
ftconn.TotalFileSize = stream.ReadUint();
int strlen = 0;
byte[] servicedata = stream.ReadByteArrayToEnd();
// The filename in an RD invite is null-terminated ASCII
while (servicedata[strlen++] != 0x00) ;
ftconn.FileHeader.Name = Encoding.ASCII.GetString(servicedata, 0, strlen - 1);
}
parent.OnDirectConnectionRequestReceived(conn.Cookie);
}
else if (conn.Sequence == RendezvousSequence.Stage2)
{
// The receipient of a previous invite wants a stage 2 proxy redirection
// Shut down the server socket, we won't be getting a connection on it
conn.StopListeningSocket();
SendDirectConnectionAccept(conn);
conn.StartSendThroughStage2AolProxy();
}
else if (conn.Sequence == RendezvousSequence.Stage3)
{
// Direct connection and proxy 2 failed, the sender's trying to proxy it now
conn.Method = DirectConnectionMethod.Proxied;
conn.ConnectToServer();
}
}
}
