/// <summary>
/// Synchronously reads a packet from a Rendezvous proxy connection
/// </summary>
private RendezvousProxyPacket ReadProxyPacket()
{
int bytesreceived = 0;
byte[] header = new byte[12];
while (bytesreceived < header.Length)
{
bytesreceived += socket.Read(header, bytesreceived, header.Length - bytesreceived);
}
Logging.DumpFLAP(header, "Rendezvous proxy read packet header");
RendezvousProxyPacket retval = new RendezvousProxyPacket();
using (ByteStream bstream = new ByteStream(header))
{
retval.Data = new byte[bstream.ReadUshort() - 10];
bstream.AdvanceToPosition(4);
retval.Command = (RendezvousProxyCommand)bstream.ReadUshort();
}
bytesreceived = 0;
while (bytesreceived < retval.Data.Length)
{
bytesreceived +=
socket.Read(retval.Data, bytesreceived, retval.Data.Length - bytesreceived);
}
Logging.DumpFLAP(retval.Data, "Rendezvous proxy read packet data");
return(retval);
}
public void TestByteStreamReading()
{
// Test bytes
using (ByteStream stream = new ByteStream(testData))
{
for (int i = 0; i < testData.Length; i++)
{
Assert.AreEqual(testData[i], stream.ReadByte(), "ReadByte returned incorrect value");
}
}
// Test ushorts
using (ByteStream stream = new ByteStream(testData))
{
Assert.AreEqual(0x0841, stream.ReadUshort());
Assert.AreEqual(0x6472, stream.ReadUshort());
Assert.AreEqual(0x6965, stream.ReadUshort());
Assert.AreEqual(0x6e6e, stream.ReadUshort());
}
// Test uints
using (ByteStream stream = new ByteStream(testData))
{
Assert.AreEqual(0x08416472, stream.ReadUint());
Assert.AreEqual(0x69656e6e, stream.ReadUint());
}
// Test string
using (ByteStream stream = new ByteStream(testData))
{
Assert.AreEqual("Adrienne", stream.ReadString(stream.ReadByte(), Encoding.ASCII));
}
}
/// <summary>
/// Completes the initial connection to the AOL proxy server
/// </summary>
/// <remarks>This method is used to complete the proxy server transaction for both
/// Stage 1 sending and Stage 2 receiver-redirect proxy scenarios</remarks>
private void InitAolProxyConnectFinished()
{
try
{
ProxyInitializeSend();
RendezvousProxyPacket rpp = ReadProxyPacket();
if (rpp.Command == RendezvousProxyCommand.Acknowledge)
{
using (ByteStream bstream = new ByteStream(rpp.Data))
{
Port = bstream.ReadUshort();
aolProxyIP = (new IPAddress(bstream.ReadByteArray(4))).ToString();
}
// Send the "send file" request on SNAC(04,06):02
parent.Messages.RequestDirectConnectionInvite(this);
// Wait for the proxy to send its 12 byte READY sequence
lock (socket)
{
socket.BeginRead(new byte[12], 0, 12, new AsyncCallback(ProxyReceivedReady), null);
//socket.BeginReceive(new byte[12], 0, 12, SocketFlags.None, new AsyncCallback(ProxyReceivedReady), null);
}
}
else
{
ushort error = (ushort)((rpp.Data[0] << 8) | rpp.Data[1]);
if (error == 0x0004)
{
throw new Exception("Recipient not logged in");
}
else if (error == 0x000D)
{
throw new Exception("Client sent bad request");
}
throw new Exception("AOL proxy sent unknown error");
}
}
catch (Exception ex)
{
if (DirectConnectionFailed != null)
{
DirectConnectionFailed(ex.Message);
}
}
}
/// <summary>
/// Processes the parameter information sent by the server -- SNAC(13,03)
/// </summary>
/// <param name="dp">A <see cref="DataPacket"/> object with a buffer containing SNAC(13,03)</param>
public static void ProcessParametersList(DataPacket dp)
{
List <ushort> maximums = new List <ushort>();
using (TlvBlock tlvs = new TlvBlock(dp.Data.ReadByteArrayToEnd()))
{
using (ByteStream stream = new ByteStream(tlvs.ReadByteArray(0x0004)))
{
while (stream.HasMoreData)
{
maximums.Add(stream.ReadUshort());
}
}
}
// Do something with these capabilities
dp.ParentSession.Limits.MaxBuddies = maximums[0];
dp.ParentSession.Limits.MaxGroups = maximums[1];
dp.ParentSession.Limits.MaxPermits = maximums[2];
dp.ParentSession.Limits.MaxDenys = maximums[3];
dp.ParentSession.ParameterSetArrived();
}
/// <summary>
/// Parses a byte buffer into an <see cref="BartID"/> object
/// </summary>
private void ReadIconInfo(byte[] buffer, UserInfo userinfo)
{
using (ByteStream iconStream = new ByteStream(buffer))
{
int iconStreamSize = iconStream.GetByteCount();
while (iconStream.CurrentPosition + 4 <= iconStreamSize)
{
BartID item = new BartID(iconStream);
// Find the end of the current data item in the stream
int endDataPosition = iconStream.CurrentPosition + item.Data.Length;
switch (item.Type)
{
case BartTypeId.BuddyIcon:
if (!GraphicsManager.IsBlankIcon(item.Data))
{
userinfo.Icon = item;
}
break;
case BartTypeId.StatusString: // Available message
using (ByteStream messageStream = new ByteStream(item.Data))
{
Encoding encoding = Encoding.UTF8;
byte[] amessage = new byte[0];
if (messageStream.HasMoreData)
{
// Pull the message to a byte array, assume at first that the encoding
// is UTF-8. If existing encoding information exists, use that instead
amessage = messageStream.ReadByteArray(messageStream.ReadByte());
// Check if there's encoding information available
if (messageStream.HasMoreData)
{
// Check to see if the encoding's been specified
if (messageStream.ReadUshort() == 0x0001)
{
messageStream.AdvanceOffset(2);
string encodingStr = messageStream.ReadString(messageStream.ReadUshort(), Encoding.ASCII);
// Try to use the encoding from the byte stream
try
{
encoding = Encoding.GetEncoding(encodingStr);
}
catch (ArgumentException)
{
Logging.WriteString(
"ReadIconInfo: Got unknown encoding for available message ("
+ encodingStr + "), falling back to UTF-8");
encoding = Encoding.UTF8;
}
}
}
}
userinfo.AvailableMessage = Encoding.Unicode.GetString(
Encoding.Convert(encoding, Encoding.Unicode, amessage));
}
break;
default:
break;
}
}
}
}
/// <summary>
/// Synchronously reads a packet from a Rendezvous proxy connection
/// </summary>
private RendezvousProxyPacket ReadProxyPacket()
{
int bytesreceived = 0;
byte[] header = new byte[12];
while (bytesreceived < header.Length)
{
bytesreceived += socket.Read(header, bytesreceived, header.Length - bytesreceived);
}
Logging.DumpFLAP(header, "Rendezvous proxy read packet header");
RendezvousProxyPacket retval = new RendezvousProxyPacket();
using (ByteStream bstream = new ByteStream(header))
{
retval.Data = new byte[bstream.ReadUshort() - 10];
bstream.AdvanceToPosition(4);
retval.Command = (RendezvousProxyCommand)bstream.ReadUshort();
}
bytesreceived = 0;
while (bytesreceived < retval.Data.Length)
{
bytesreceived +=
socket.Read(retval.Data, bytesreceived, retval.Data.Length - bytesreceived);
}
Logging.DumpFLAP(retval.Data, "Rendezvous proxy read packet data");
return retval;
}
/// <summary>
/// Completes the initial connection to the AOL proxy server
/// </summary>
/// <remarks>This method is used to complete the proxy server transaction for both
/// Stage 1 sending and Stage 2 receiver-redirect proxy scenarios</remarks>
private void InitAolProxyConnectFinished()
{
try
{
ProxyInitializeSend();
RendezvousProxyPacket rpp = ReadProxyPacket();
if (rpp.Command == RendezvousProxyCommand.Acknowledge)
{
using (ByteStream bstream = new ByteStream(rpp.Data))
{
Port = bstream.ReadUshort();
aolProxyIP = (new IPAddress(bstream.ReadByteArray(4))).ToString();
}
// Send the "send file" request on SNAC(04,06):02
parent.Messages.RequestDirectConnectionInvite(this);
// Wait for the proxy to send its 12 byte READY sequence
lock (socket)
{
socket.BeginRead(new byte[12], 0, 12, new AsyncCallback(ProxyReceivedReady), null);
//socket.BeginReceive(new byte[12], 0, 12, SocketFlags.None, new AsyncCallback(ProxyReceivedReady), null);
}
}
else
{
ushort error = (ushort)((rpp.Data[0] << 8) | rpp.Data[1]);
if (error == 0x0004)
{
throw new Exception("Recipient not logged in");
}
else if (error == 0x000D)
{
throw new Exception("Client sent bad request");
}
throw new Exception("AOL proxy sent unknown error");
}
}
catch (Exception ex)
{
if (DirectConnectionFailed != null)
{
DirectConnectionFailed(ex.Message);
}
}
}
/// <summary>
/// Verifies that a JPEG File Interchange Format image falls inside the
/// AOL-required dimensions: between 48x48 and 50x50
/// </summary>
/// <param name="fs">
/// An opened <see cref="FileStream"/> two bytes into the JFIF.
/// </param>
/// <returns>
/// <c>true</c> if the JFIF fits in the required dimensions,
/// <c>false</c> otherwise.
/// </returns>
private static bool VerifyJFIF(FileStream fs)
{
// Scroll to the Start Frame 0 position in the image
bool foundframe0 = false;
while (!foundframe0 && fs.Position < fs.Length)
{
if (fs.ReadByte() == 0xFF && fs.ReadByte() == 0xC0)
break;
}
if (fs.Position == fs.Length)
return false;
// Three skip bytes, then the next four are the width and height (in NBO format)
byte[] size = new byte[7];
if (fs.Read(size, 0, size.Length) != size.Length)
return false;
ushort height = 0, width = 0;
using (ByteStream bstream = new ByteStream(size))
{
bstream.AdvanceToPosition(3);
height = bstream.ReadUshort();
width = bstream.ReadUshort();
}
return (width >= 48 && width <= 50) && (height >= 48 && height <= 50);
}
/// <summary>
/// Initializes a new BartID from a byte stream
/// </summary>
internal BartID(ByteStream stream)
{
type = (BartTypeId)stream.ReadUshort();
flags = (BartFlags)stream.ReadByte();
byte dataLength = stream.ReadByte();
data = stream.ReadByteArray(dataLength);
}
/// <summary>
/// Processes the parameter information sent by the server -- SNAC(13,03)
/// </summary>
/// <param name="dp">A <see cref="DataPacket"/> object with a buffer containing SNAC(13,03)</param>
public static void ProcessParametersList(DataPacket dp)
{
List<ushort> maximums = new List<ushort>();
using (TlvBlock tlvs = new TlvBlock(dp.Data.ReadByteArrayToEnd()))
{
using (ByteStream stream = new ByteStream(tlvs.ReadByteArray(0x0004)))
{
while (stream.HasMoreData)
{
maximums.Add(stream.ReadUshort());
}
}
}
// Do something with these capabilities
dp.ParentSession.Limits.MaxBuddies = maximums[0];
dp.ParentSession.Limits.MaxGroups = maximums[1];
dp.ParentSession.Limits.MaxPermits = maximums[2];
dp.ParentSession.Limits.MaxDenys = maximums[3];
dp.ParentSession.ParameterSetArrived();
}
/// <summary>
/// Processes the received message
/// </summary>
private void EndReadHeader(IAsyncResult res)
{
byte[] odcheader = null;
try
{
odcheader = (byte[])res.AsyncState;
socket.EndRead(res);
}
catch (Exception ex)
{
Logging.WriteString(String.Format("Exception in DirectIMConnection.EndReadHeader: {0}", ex));
DisconnectFromServer(true);
}
// Verify that this is an ODC header
if (Encoding.ASCII.GetString(odcheader, 0, 4) != "ODC2")
{
// Huh...
return;
}
ushort datalen = (ushort)((odcheader[4] << 8) | odcheader[5]);
if (datalen < 6)
{
// Oh
return;
}
ByteStream messageheader = ReadPacket(datalen - 6);
if (messageheader == null)
{
// Tum ta tiddily tumpa turr
return;
}
// Extract various members from the message header
messageheader.AdvanceToPosition(6);
byte[] cookie = messageheader.ReadByteArray(8);
messageheader.AdvanceToPosition(22);
uint datalength = messageheader.ReadUint();
ushort charset = messageheader.ReadUshort();
ushort subcharset = messageheader.ReadUshort();
DirectIMFlags flags = (DirectIMFlags)messageheader.ReadUint();
messageheader.AdvanceToPosition(38);
string screenname = messageheader.ReadString(16, Encoding.ASCII);
if ((flags & DirectIMFlags.TypingPacket) != 0)
{
// Determine the type of typing packet this is
if ((flags & DirectIMFlags.UserTyping) != 0)
{
//_parent.OnTypingNotification(screenname, TypingNotification.TypingStarted);
}
else if ((flags & DirectIMFlags.UserTyped) != 0)
{
//_parent.OnTypingNotification(screenname, TypingNotification.TextTyped);
}
else
{
// TODO: restore these
// _parent.OnTypingNotification(screenname, TypingNotification.TypingFinished);
}
// Probably no data, but read it in anyway to make sure we're not missing anything
ReadPacket((int)datalength);
}
else if ((flags & DirectIMFlags.ConfirmationPacket) != 0 && datalength == 0)
{
// Do we really do anything here? I don't think so.
}
else
{
// Create a new instant message
DirectIM dim = new DirectIM(Other.ScreenName, this);
dim.Cookie = csammisrun.OscarLib.Cookie.GetReceivedCookie(cookie);
dim.IsAutoResponse = ((flags & DirectIMFlags.AutoResponse) != 0);
dim.Encoding = IM.GetEncodingFromCharset(charset, subcharset);
// Create a spooler to incrementally read in a DirectIM packet,
// then restart the read sequence when it's done
DirectIMDataReader reader = new DirectIMDataReader(this, dim);
reader.DataReaderComplete += new DataReaderCompleteHandler(delegate
{
parent.OnDirectIMReceived(
reader.Message);
reader.Dispose();
ReadHeader();
});
reader.Read(datalength);
return;
}
// Restart the read sequence
ReadHeader();
}
/// <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();
}
}
}
/// <summary>
/// Processes the inner TLV list in TLV 0x0005 and returns a new DirectConnection
/// </summary>
private DirectConnection ProcessChannel2Tlv05(ByteStream stream, UserInfo ui, DataPacket dp)
{
byte[] invitemessage;
Encoding encoding = Encoding.ASCII;
string language = "en";
DirectConnection directconn = null;
// Pull the type, cookie, and capability array
RendezvousType rtype = RendezvousData.TypeFromUshort(stream.ReadUshort());
Cookie cookie = Cookie.GetReceivedCookie(stream.ReadByteArray(8));
byte[] capabilitiesArray = stream.ReadByteArray(16);
Capabilities capabilities = CapabilityProcessor.ProcessCLSIDList(capabilitiesArray);
// Create the correct type of connection based on the capability
if (capabilities == Capabilities.SendFiles)
{
if ((directconn = parent.Connections.GetDirectConnectionByCookie(cookie)) == null)
{
directconn = parent.Connections.CreateNewFileTransferConnection(
DirectConnectionMethod.Direct, DirectConnectRole.Receiver);
}
}
else if (capabilities == Capabilities.DirectIM)
{
if ((directconn = parent.Connections.GetDirectConnectionByCookie(cookie)) == null)
{
directconn = parent.Connections.CreateNewDirectIMConnection(
DirectConnectionMethod.Direct, DirectConnectRole.Receiver);
}
}
else if (capabilities == Capabilities.Chat)
{
directconn = parent.Connections.CreateNewChatInvitationConnection(DirectConnectRole.Receiver);
}
else
{
// Currently unsupported
parent.OnWarning(ServerErrorCode.UnknownRendezvousChannel, dp);
return null;
}
directconn.Other = ui;
directconn.Cookie = cookie;
directconn.Type = rtype;
ByteStream serviceData = null;
Encoding serviceDataEncoding = Encoding.ASCII;
// Process the inner TLV list
using (TlvBlock tlvs = new TlvBlock(stream.ReadByteArrayToEnd()))
{
directconn.AOLProxyIP = tlvs.ReadIPAddress(DC_PROXY_IP_ADDRESS); // proxy ip
directconn.ClientIP = tlvs.ReadIPAddress(DC_CLIENT_IP_ADDRESS); // internal ip
directconn.VerifiedIP = tlvs.ReadIPAddress(0x0004); // external ip
directconn.Port = tlvs.ReadUshort(DC_PORT);
directconn.Sequence = RendezvousData.SequenceFromUshort(tlvs.ReadUshort(DC_SEQUENCE_NUMBER));
invitemessage = tlvs.ReadByteArray(DC_MESSAGE);
if (tlvs.HasTlv(0x000D))
{
encoding = Encoding.GetEncoding(tlvs.ReadString(0x000D, Encoding.ASCII));
}
language = tlvs.ReadString(0x000E, Encoding.ASCII);
directconn.Method = (tlvs.HasTlv(DC_USE_PROXY_FLAG))
?
DirectConnectionMethod.Proxied
: DirectConnectionMethod.Direct;
serviceData = new ByteStream(tlvs.ReadByteArray(0x2711));
if (tlvs.HasTlv(0x2712))
{
serviceDataEncoding = Encoding.GetEncoding(tlvs.ReadString(0x2712, Encoding.ASCII));
}
}
if (invitemessage != null)
{
directconn.Message = encoding.GetString(invitemessage, 0, invitemessage.Length);
}
// Process the extra data, if necessary
if (directconn is FileTransferConnection || directconn is DirectIMConnection)
{
ProcessDirectConnectionRequest(directconn, serviceData);
}
else if (directconn is ChatInvitationConnection)
{
ChatInvitationConnection cic = directconn as ChatInvitationConnection;
cic.ChatInvite = new ChatInvitation();
cic.ChatInvite.Message = directconn.Message;
cic.ChatInvite.Encoding = encoding;
cic.ChatInvite.Language = language;
ProcessChatInvitationRequest(cic, serviceData);
}
return directconn;
}
/// <summary>
/// Retrieves the message text from SNAC(04,07) TLV 02
/// </summary>
/// <param name="stream">A received <see cref="ByteStream"/></param>
/// <param name="message">An <see cref="IM"/> object to be populated</param>
private void GetChannelOneMessage(ByteStream stream, ref IM message)
{
while (stream.HasMoreData)
{
byte identifier = stream.ReadByte();
byte version = stream.ReadByte();
ushort length = stream.ReadUshort();
switch (identifier)
{
case 0x01: // Message text
ushort charset = stream.ReadUshort();
ushort language = stream.ReadUshort();
Encoding incoming = IM.GetEncodingFromCharset(charset, language);
message.Message = Encoding.Unicode.GetString(
Encoding.Convert(incoming, Encoding.Unicode, stream.ReadByteArray(length - 4)));
break;
default: // Unhandled case
stream.AdvanceOffset(length);
break;
}
}
}
/// <summary>
/// Retrieves the message text from SNAC(04,07) TLV 05
/// </summary>
/// <param name="stream">A received <see cref="ByteStream"/></param>
/// <param name="message">An <see cref="IM"/> object to be populated</param>
private void GetChannelfourMessage(ByteStream stream, ref IM message)
{
stream.ReadByteArray(46); //fixed unknon part
ushort length = stream.ReadUshort();
ushort charset = stream.ReadUshort();
stream.ReadByte();
ushort charsubset = (ushort)0;//stream.ReadUshort();
Encoding incoming = IM.GetEncodingFromCharset(charset, charsubset);
string xml = Encoding.Unicode.GetString(
Encoding.Convert(incoming, Encoding.Unicode, stream.ReadByteArray(length)));
// parse xml
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.LoadXml(xml);
System.Xml.XmlNode node = doc.SelectSingleNode("/sms_message/text");
if (node != null)
{
message.Message = node.InnerText;
}
node = doc.SelectSingleNode("/sms_message/sender");
if (node != null)
{
message.ScreenName = node.InnerText;
}
}
/// <summary>
/// Parses a byte buffer into an <see cref="BartID"/> object
/// </summary>
private void ReadIconInfo(byte[] buffer, UserInfo userinfo)
{
using (ByteStream iconStream = new ByteStream(buffer))
{
int iconStreamSize = iconStream.GetByteCount();
while (iconStream.CurrentPosition + 4 <= iconStreamSize)
{
BartID item = new BartID(iconStream);
// Find the end of the current data item in the stream
int endDataPosition = iconStream.CurrentPosition + item.Data.Length;
switch (item.Type)
{
case BartTypeId.BuddyIcon:
if (!GraphicsManager.IsBlankIcon(item.Data))
{
userinfo.Icon = item;
}
break;
case BartTypeId.StatusString: // Available message
using (ByteStream messageStream = new ByteStream(item.Data))
{
Encoding encoding = Encoding.UTF8;
byte[] amessage = new byte[0];
if (messageStream.HasMoreData)
{
// Pull the message to a byte array, assume at first that the encoding
// is UTF-8. If existing encoding information exists, use that instead
amessage = messageStream.ReadByteArray(messageStream.ReadByte());
// Check if there's encoding information available
if (messageStream.HasMoreData)
{
// Check to see if the encoding's been specified
if (messageStream.ReadUshort() == 0x0001)
{
messageStream.AdvanceOffset(2);
string encodingStr = messageStream.ReadString(messageStream.ReadUshort(), Encoding.ASCII);
// Try to use the encoding from the byte stream
try
{
encoding = Encoding.GetEncoding(encodingStr);
}
catch (ArgumentException)
{
Logging.WriteString(
"ReadIconInfo: Got unknown encoding for available message ("
+ encodingStr + "), falling back to UTF-8");
encoding = Encoding.UTF8;
}
}
}
}
userinfo.AvailableMessage = Encoding.Unicode.GetString(
Encoding.Convert(encoding, Encoding.Unicode, amessage));
}
break;
default:
break;
}
}
}
}
