internal bool HandleRAK(Contact source, Guid sourceGuid, P2PMessage msg)
{
bool requireAck = false;
if (msg.Header.RequireAck)
{
requireAck = true;
P2PMessage ack = msg.CreateAcknowledgement();
if (ack.Header.RequireAck)
{
// SYN
Send(null, source, sourceGuid, ack, DefaultTimeout, delegate(P2PMessage sync)
{
SyncId = sync.Header.AckIdentifier;
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
String.Format("SYNC completed for: {0}", this), GetType().Name);
});
}
else
{
// ACK
Send(null, source, sourceGuid, ack);
}
}
return(requireAck);
}
public virtual void SendMessage(P2PMessage msg, P2PMessageSessionEventArgs se)
{
// if it is a regular message convert it
P2PDCMessage p2pMessage = msg as P2PDCMessage;
if (p2pMessage == null)
{
p2pMessage = new P2PDCMessage(msg);
}
// prepare the message
p2pMessage.PrepareMessage();
// this is very bloated!
Trace.WriteLineIf(Settings.TraceSwitch.TraceVerbose, "Outgoing message:\r\n" + p2pMessage.ToDebugString(), GetType().Name);
if (dcSocket != null)
{
Processor.SendSocketData(dcSocket, p2pMessage.GetBytes(), se);
}
else
{
Processor.Send(p2pMessage.GetBytes(), se);
}
}
internal bool CheckSLPMessage(P2PBridge bridge, Contact source, Guid sourceGuid, P2PMessage msg, SLPMessage slp)
{
string src = source.Account.ToLowerInvariant();
string target = nsMessageHandler.Owner.Account;
if (slp.FromEmailAccount.ToLowerInvariant() != src)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("Received message from '{0}', differing from source '{1}'", slp.Source, src), GetType().Name);
return false;
}
else if (slp.ToEmailAccount.ToLowerInvariant() != target)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("Received P2P message intended for '{0}', not us '{1}'", slp.Target, target), GetType().Name);
if (slp.FromEmailAccount == target)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
"We received a message from ourselves?", GetType().Name);
}
else
{
SendSLPStatus(bridge, msg, source, sourceGuid, 404, "Not Found");
}
return false;
}
return true;
}
public void Add(Contact remote, Guid remoteGuid, P2PMessage message)
{
lock (this)
{
base.Add(new P2PSendItem(remote, remoteGuid, message));
}
}
private P2PSession FindSessionByExpectedIdentifier(P2PMessage p2pMessage)
{
if (p2pMessage.Version == P2PVersion.P2PV2)
{
foreach (P2PSession session in p2pV2Sessions)
{
uint expected = session.RemoteIdentifier;
if (p2pMessage.Header.Identifier == expected)
{
return(session);
}
}
}
else
{
foreach (P2PSession session in p2pV1Sessions)
{
uint expected = session.RemoteIdentifier + 1;
if (expected == session.RemoteBaseIdentifier)
{
expected++;
}
if (p2pMessage.Header.Identifier == expected)
{
return(session);
}
}
}
return(null);
}
public void ProcessP2PMessage(Contact source, Guid sourceGuid, P2PMessage p2pMessage)
{
// HANDLE RAK: RAKs are session independent and mustn't be quoted on bridges.
bool requireAck = HandleRAK(source, sourceGuid, p2pMessage);
// HANDLE ACK: ACK/NAK to our RAK message
if (HandleACK(p2pMessage))
{
return;
}
// PASS TO P2PHandler
if (nsMessageHandler.P2PHandler.ProcessP2PMessage(this, source, sourceGuid, p2pMessage))
{
return;
}
if (!requireAck)
{
// UNHANDLED P2P MESSAGE
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("*******Unhandled P2P message ****** \r\n{0}", p2pMessage.ToDebugString()), GetType().Name);
// Keep RemoteID Synchronized, I think we must track remoteIdentifier here...
// Send NAK??????
}
}
internal bool SendDirectInvite()
{
// Skip if we're currently using a TCPBridge.
if (Remote.DirectBridge != null && Remote.DirectBridge.IsOpen)
{
return(false);
}
int netId;
string connectionType = ConnectionType(nsMessageHandler, out netId);
P2PMessage p2pMessage = new P2PMessage(Version);
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
String.Format("Connection type set to {0} for session {1}", connectionType, SessionId.ToString()));
// Create the message
SLPRequestMessage slpMessage = new SLPRequestMessage(RemoteContactEPIDString, MSNSLPRequestMethod.INVITE);
slpMessage.Source = LocalContactEPIDString;
slpMessage.CSeq = 0;
slpMessage.CallId = Invitation.CallId;
slpMessage.MaxForwards = 0;
slpMessage.ContentType = "application/x-msnmsgr-transreqbody";
slpMessage.BodyValues["Bridges"] = "TCPv1 SBBridge";
slpMessage.BodyValues["Capabilities-Flags"] = "1";
slpMessage.BodyValues["NetID"] = netId.ToString(CultureInfo.InvariantCulture);
slpMessage.BodyValues["Conn-Type"] = connectionType;
slpMessage.BodyValues["TCP-Conn-Type"] = connectionType;
slpMessage.BodyValues["UPnPNat"] = "false"; // UPNP Enabled
slpMessage.BodyValues["ICF"] = (connectionType == "Firewall").ToString(); // Firewall enabled
slpMessage.BodyValues["Nat-Trav-Msg-Type"] = "WLX-Nat-Trav-Msg-Direct-Connect-Req";
// We support Hashed-Nonce ( 2 way handshake )
Remote.GenerateNewDCKeys();
slpMessage.BodyValues["Hashed-Nonce"] = Remote.dcLocalHashedNonce.ToString("B").ToUpper(CultureInfo.InvariantCulture);
p2pMessage.InnerMessage = slpMessage;
if (p2pMessage.Version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.TFCombination = TFCombination.First;
}
else if (p2pMessage.Version == P2PVersion.P2PV1)
{
p2pMessage.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
// These 3 step is very important...
// 1- Stop sending for this session on sdgbridge until we receive a response to the direct invite or the timeout expires
nsMessageHandler.SDGBridge.StopSending(this);
// 2- Setup a dc timer.
SetupDCTimer();
// 3- Don't pass p2psession to the sdg bridge. Because, sdgbridge stopped this session.
nsMessageHandler.SDGBridge.Send(null /*must be null to bypass queueing*/,
Remote, RemoteContactEndPointID, p2pMessage);
return(true);
}
private P2PSession FindSession(P2PMessage msg, SLPMessage slp)
{
P2PSession p2pSession = null;
uint sessionID = (msg != null) ? msg.Header.SessionId : 0;
if ((sessionID == 0) && (slp != null))
{
if (slp.BodyValues.ContainsKey("SessionID"))
{
if (!uint.TryParse(slp.BodyValues["SessionID"].Value, out sessionID))
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
"Unable to parse SLP message SessionID", GetType().Name);
sessionID = 0;
}
}
if (sessionID == 0)
{
// We don't get a session ID in BYE requests
// So we need to find the session by its call ID
P2PVersion p2pVersion = slp.P2PVersion;
p2pSession = FindSessionByCallId(slp.CallId, p2pVersion);
if (p2pSession != null)
{
return(p2pSession);
}
}
}
// Sometimes we only have a messageID to find the session with...
if ((sessionID == 0) && (msg.Header.Identifier != 0))
{
p2pSession = FindSessionByExpectedIdentifier(msg);
if (p2pSession != null)
{
return(p2pSession);
}
}
if (sessionID != 0)
{
p2pSession = FindSessionBySessionId(sessionID, msg.Version);
if (p2pSession != null)
{
return(p2pSession);
}
}
return(null);
}
public void Send(P2PMessage p2pMessage, int ackTimeout, AckHandler ackHandler)
{
ResetTimeoutTimer();
if (p2pBridge == null)
{
MigrateToOptimalBridge();
}
p2pBridge.Send(this, Remote, RemoteContactEndPointID, p2pMessage, ackTimeout, ackHandler);
}
public P2PAckMessageEventArgs(P2PMessage p2pMessage, AckHandler ackHandler, int timeoutSec)
: base(p2pMessage)
{
this.ackHandler = ackHandler;
this.deleteTick = timeoutSec;
if (timeoutSec != 0)
{
AddSeconds(timeoutSec);
}
}
public P2PAckMessageEventArgs(P2PMessage p2pMessage, AckHandler ackHandler, int timeoutSec)
: base(p2pMessage)
{
this.ackHandler = ackHandler;
this.deleteTick = timeoutSec;
if (timeoutSec != 0)
{
AddSeconds(timeoutSec);
}
}
/// <summary>
///
/// </summary>
/// <param name="bridge"></param>
/// <param name="p2pMessage"></param>
/// <returns></returns>
public bool ProcessP2PData(P2PBridge bridge, P2PMessage p2pMessage)
{
ResetTimeoutTimer();
// Keep track of the remote identifier
remoteIdentifier = (p2pMessage.Version == P2PVersion.P2PV2) ?
p2pMessage.Header.Identifier + p2pMessage.Header.MessageSize :
p2pMessage.Header.Identifier;
if (status == P2PSessionStatus.Closed || status == P2PSessionStatus.Error)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("P2PSession {0} received message whilst in '{1}' state", sessionId, status), GetType().Name);
return(false);
}
if (p2pApplication == null)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("P2PSession {0}: Received message for P2P app, but it's either been disposed or not created", sessionId), GetType().Name);
return(false);
}
else
{
// Application data
if (p2pMessage.Header.MessageSize > 0 && p2pMessage.Header.SessionId > 0)
{
bool reset = false;
byte[] appData = new byte[0];
if (p2pMessage.Header.MessageSize == 4 && BitUtility.ToInt32(p2pMessage.InnerBody, 0, true) == 0)
{
reset = true;
}
else
{
appData = new byte[p2pMessage.InnerBody.Length];
Buffer.BlockCopy(p2pMessage.InnerBody, 0, appData, 0, appData.Length);
}
if (p2pMessage.Version == P2PVersion.P2PV2 &&
(TFCombination.First == (p2pMessage.V2Header.TFCombination & TFCombination.First)))
{
reset = true;
}
return(p2pApplication.ProcessData(bridge, appData, reset));
}
return(false);
}
}
/// <summary>
/// Creates an acknowledgement message to this message.
/// </summary>
/// <returns></returns>
public virtual P2PMessage CreateAcknowledgement()
{
P2PMessage ack = new P2PMessage(Version);
ack.Header = Header.CreateAck();
if (Version == P2PVersion.P2PV1)
{
ack.Footer = Footer; //Keep the same as the message to acknowladge.
}
return(ack);
}
public P2PMessage(P2PMessage message)
: this(message.Version)
{
Header.SessionId = message.Header.SessionId;
Header.Identifier = message.Header.Identifier;
Header.TotalSize = message.Header.TotalSize;
Header.MessageSize = message.Header.MessageSize;
Header.AckIdentifier = message.Header.AckIdentifier;
if (message.Version == P2PVersion.P2PV1)
{
V1Header.Offset = message.V1Header.Offset;
V1Header.Flags = message.V1Header.Flags;
V1Header.AckSessionId = message.V1Header.AckSessionId;
V1Header.AckTotalSize = message.V1Header.AckTotalSize;
}
else if (message.Version == P2PVersion.P2PV2)
{
V2Header.OperationCode = message.V2Header.OperationCode;
V2Header.TFCombination = message.V2Header.TFCombination;
V2Header.PackageNumber = message.V2Header.PackageNumber;
V2Header.DataRemaining = message.V2Header.DataRemaining;
if (message.V2Header.HeaderTLVs.Count > 0)
{
foreach (KeyValuePair <byte, byte[]> keyvalue in message.V2Header.HeaderTLVs)
{
V2Header.HeaderTLVs[keyvalue.Key] = keyvalue.Value;
}
}
if (message.V2Header.DataPacketTLVs.Count > 0)
{
foreach (KeyValuePair <byte, byte[]> keyvalue in message.V2Header.DataPacketTLVs)
{
V2Header.DataPacketTLVs[keyvalue.Key] = keyvalue.Value;
}
}
}
if (message.InnerMessage != null)
{
InnerMessage = message.InnerMessage;
}
if (message.InnerBody != null)
{
InnerBody = message.InnerBody;
}
Footer = message.Footer;
}
public bool Contains(P2PMessage msg)
{
lock (this)
{
foreach (P2PSendItem item in this)
{
if (item.P2PMessage == msg)
{
return(true);
}
}
}
return(false);
}
private P2PMessage[] SetSequenceNumberAndRegisterAck(P2PSession session, Contact remote, P2PMessage p2pMessage, AckHandler ackHandler, int timeout)
{
if (p2pMessage.Header.Identifier == 0)
{
if (p2pMessage.Version == P2PVersion.P2PV1)
{
p2pMessage.Header.Identifier = ++sequenceId;
}
else if (p2pMessage.Version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.Identifier = sequenceId;
}
}
if (p2pMessage.Version == P2PVersion.P2PV1 && p2pMessage.V1Header.AckSessionId == 0)
{
p2pMessage.V1Header.AckSessionId = (uint)new Random().Next(50000, int.MaxValue);
}
if (p2pMessage.Version == P2PVersion.P2PV2 && p2pMessage.V2Header.PackageNumber == 0)
{
p2pMessage.V2Header.PackageNumber = packageNo;
}
P2PMessage[] msgs = p2pMessage.SplitMessage(MaxDataSize);
if (p2pMessage.Version == P2PVersion.P2PV2)
{
// Correct local sequence no
P2PMessage lastMsg = msgs[msgs.Length - 1];
SequenceId = lastMsg.V2Header.Identifier + lastMsg.V2Header.MessageSize;
}
if (ackHandler != null)
{
P2PMessage firstMessage = msgs[0];
RegisterAckHandler(new P2PAckMessageEventArgs(firstMessage, ackHandler, timeout));
}
if (session != null)
{
session.LocalIdentifier = SequenceId;
}
return(msgs);
}
internal P2PMessage WrapSLPMessage(SLPMessage slpMessage)
{
P2PMessage p2pMessage = new P2PMessage(Version);
p2pMessage.InnerMessage = slpMessage;
if (Version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.TFCombination = TFCombination.First;
p2pMessage.V2Header.PackageNumber = ++Bridge.PackageNo;
}
else if (Version == P2PVersion.P2PV1)
{
p2pMessage.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
return(p2pMessage);
}
internal void SendSLPStatus(P2PBridge bridge, P2PMessage msg, Contact dest, Guid destGuid, int code, string phrase)
{
string target = dest.Account.ToLowerInvariant();
if (msg.Version == P2PVersion.P2PV2)
{
target += ";" + destGuid.ToString("B");
}
SLPMessage slp = new SLPStatusMessage(target, code, phrase);
if (msg.IsSLPData)
{
SLPMessage msgSLP = msg.InnerMessage as SLPMessage;
slp.Branch = msgSLP.Branch;
slp.CallId = msgSLP.CallId;
slp.Source = msgSLP.Target;
slp.ContentType = msgSLP.ContentType;
if (msgSLP.BodyValues.ContainsKey("SessionID"))
{
slp.BodyValues["SessionID"] = msgSLP.BodyValues["SessionID"];
}
}
else
{
slp.ContentType = "null";
}
P2PMessage response = new P2PMessage(msg.Version);
response.InnerMessage = slp;
if (msg.Version == P2PVersion.P2PV1)
{
response.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
else if (msg.Version == P2PVersion.P2PV2)
{
response.V2Header.OperationCode = (byte)OperationCode.None;
response.V2Header.TFCombination = TFCombination.First;
}
bridge.Send(null, dest, destGuid, response);
}
/// <summary>
/// Closes the session.
/// </summary>
public void Close()
{
if (status == P2PSessionStatus.Closing)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("P2PSession {0} was already closing, forcing unclean closure", SessionId), GetType().Name);
OnClosed(new ContactEventArgs(Local));
}
else
{
OnClosing(new ContactEventArgs(Local));
SLPRequestMessage slpMessage = new SLPRequestMessage(RemoteContactEPIDString, "BYE");
slpMessage.Target = RemoteContactEPIDString;
slpMessage.Source = LocalContactEPIDString;
slpMessage.Branch = invitation.Branch;
slpMessage.CallId = invitation.CallId;
slpMessage.MaxForwards = 0;
slpMessage.ContentType = "application/x-msnmsgr-sessionclosebody";
slpMessage.BodyValues["SessionID"] = SessionId.ToString(System.Globalization.CultureInfo.InvariantCulture);
P2PMessage p2pMessage = new P2PMessage(Version);
if (version == P2PVersion.P2PV1)
{
p2pMessage.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
else if (version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.OperationCode = (byte)OperationCode.RAK;
p2pMessage.V2Header.TFCombination = TFCombination.First;
p2pMessage.V2Header.PackageNumber = ++p2pBridge.PackageNo;
}
p2pMessage.InnerMessage = slpMessage;
Send(p2pMessage, delegate(P2PMessage ack)
{
OnClosed(new ContactEventArgs(Local));
});
}
}
/// <summary>
/// Sends invitation message if initiated locally. Sets remote identifiers after ack received.
/// </summary>
public void Invite()
{
if (status != P2PSessionStatus.WaitingForRemote)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("Invite called, but we're not waiting for the remote client (State {0})", status), GetType().Name);
}
else
{
// Get id from bridge....
{
MigrateToOptimalBridge();
localBaseIdentifier = p2pBridge.SequenceId;
localIdentifier = localBaseIdentifier;
}
P2PMessage p2pMessage = WrapSLPMessage(invitation);
if (version == P2PVersion.P2PV2)
{
if (p2pBridge.Synced == false)
{
p2pMessage.V2Header.OperationCode = (byte)(OperationCode.SYN | OperationCode.RAK);
p2pMessage.V2Header.AppendPeerInfoTLV();
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
String.Format("{0} invitation sending with SYN+RAK op...", SessionId), GetType().Name);
}
}
p2pMessage.InnerMessage = invitation;
Send(p2pMessage, delegate(P2PMessage ack)
{
remoteBaseIdentifier = ack.Header.Identifier;
remoteIdentifier = remoteBaseIdentifier;
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
String.Format("{0} invitation sent with SYN+RAK op and received RemoteBaseIdentifier is: {1}", SessionId, remoteIdentifier), GetType().Name);
});
}
}
public P2PMessage[] CreateFromOffsets(long[] offsets, byte[] allData)
{
List <P2PMessage> messages = new List <P2PMessage>(offsets.Length);
long offset = allData.Length;
for (int i = offsets.Length - 1; i >= 0; i--)
{
P2PMessage m = new P2PMessage(Version);
long length = offset - offsets[i];
byte[] part = new byte[length];
Array.Copy(allData, offsets[i], part, 0, length);
m.ParseBytes(part);
offset -= length;
messages.Add(m);
}
messages.Reverse();
return(messages.ToArray());
}
public static Guid CreateGuidFromData(P2PVersion ver, byte[] data)
{
Guid ret = Guid.Empty;
if (ver == P2PVersion.P2PV1)
{
P2PMessage message = new P2PMessage(ver);
message.ParseBytes(data);
ret = new Guid(
(int)message.V1Header.AckSessionId,
(short)(message.Header.AckIdentifier & 0x0000FFFF),
(short)((message.Header.AckIdentifier & 0xFFFF0000) >> 16),
(byte)((message.V1Header.AckTotalSize & 0x00000000000000FF)),
(byte)((message.V1Header.AckTotalSize & 0x000000000000FF00) >> 8),
(byte)((message.V1Header.AckTotalSize & 0x0000000000FF0000) >> 16),
(byte)((message.V1Header.AckTotalSize & 0x00000000FF000000) >> 24),
(byte)((message.V1Header.AckTotalSize & 0x000000FF00000000) >> 32),
(byte)((message.V1Header.AckTotalSize & 0x0000FF0000000000) >> 40),
(byte)((message.V1Header.AckTotalSize & 0x00FF000000000000) >> 48),
(byte)((message.V1Header.AckTotalSize & 0xFF00000000000000) >> 56)
);
}
else if (ver == P2PVersion.P2PV2)
{
Int32 a = BitUtility.ToInt32(data, 0, BitConverter.IsLittleEndian);
Int16 b = BitUtility.ToInt16(data, 4, BitConverter.IsLittleEndian);
Int16 c = BitUtility.ToInt16(data, 6, BitConverter.IsLittleEndian);
byte d = data[8], e = data[9], f = data[10], g = data[11];
byte h = data[12], i = data[13], j = data[14], k = data[15];
ret = new Guid(a, b, c, d, e, f, g, h, i, j, k);
}
return ret;
}
/// <summary>
/// Rejects the received invitation.
/// </summary>
public void Decline()
{
if (status != P2PSessionStatus.WaitingForLocal)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("Declined called, but we're not waiting for the local client (State {0})", status), GetType().Name);
}
else
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo, String.Format("{0} declined", SessionId), GetType().Name);
SLPStatusMessage slpMessage = new SLPStatusMessage(RemoteContactEPIDString, 603, "Decline");
slpMessage.Target = RemoteContactEPIDString;
slpMessage.Source = LocalContactEPIDString;
slpMessage.Branch = invitation.Branch;
slpMessage.CallId = invitation.CallId;
slpMessage.CSeq = 1;
slpMessage.ContentType = "application/x-msnmsgr-sessionreqbody";
slpMessage.BodyValues["SessionID"] = SessionId.ToString(System.Globalization.CultureInfo.InvariantCulture);
P2PMessage p2pMessage = new P2PMessage(Version);
if (version == P2PVersion.P2PV1)
{
p2pMessage.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
else if (version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.OperationCode = (byte)OperationCode.RAK;
p2pMessage.V2Header.TFCombination = TFCombination.First;
p2pMessage.V2Header.PackageNumber = ++Bridge.PackageNo;
}
p2pMessage.InnerMessage = slpMessage;
Send(p2pMessage);
Close();
}
}
public void Remove(P2PMessage msg)
{
lock (this)
{
P2PSendItem?removeItem = null;
foreach (P2PSendItem item in this)
{
if (item.P2PMessage == msg)
{
removeItem = item;
break;
}
}
if (removeItem != null)
{
Remove(removeItem.Value);
return;
}
}
throw new ArgumentException("msg not found in queue");
}
protected override void SendMultiPacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage[] sendList)
{
if (remote == null)
return;
NSMessageProcessor nsmp = (NSMessageProcessor)NSMessageHandler.MessageProcessor;
string to = ((int)remote.ClientType).ToString() + ":" + remote.Account;
string from = ((int)NSMessageHandler.Owner.ClientType).ToString() + ":" + NSMessageHandler.Owner.Account;
MultiMimeMessage mmMessage = new MultiMimeMessage(to, from);
mmMessage.RoutingHeaders[MIMERoutingHeaders.From][MIMERoutingHeaders.EPID] = NSMessageHandler.MachineGuid.ToString("B").ToLowerInvariant();
mmMessage.RoutingHeaders[MIMERoutingHeaders.To][MIMERoutingHeaders.EPID] = remoteGuid.ToString("B").ToLowerInvariant();
mmMessage.RoutingHeaders[MIMERoutingHeaders.ServiceChannel] = "PE";
mmMessage.RoutingHeaders[MIMERoutingHeaders.Options] = "0";
mmMessage.ContentKeyVersion = "2.0";
mmMessage.ContentHeaders[MIMEContentHeaders.ContentType] = "application/x-msnmsgrp2p";
mmMessage.ContentHeaders[MIMEContentHeaders.ContentTransferEncoding] = "binary";
mmMessage.ContentHeaders[MIMEContentHeaders.MessageType] = MessageTypes.Data;
List<string> bridgingOffsets = new List<string>();
List<object> userStates = new List<object>();
byte[] buffer = new byte[0];
foreach (P2PMessage p2pMessage in sendList)
{
SLPMessage slpMessage = p2pMessage.IsSLPData ? p2pMessage.InnerMessage as SLPMessage : null;
if (slpMessage != null &&
((slpMessage.ContentType == "application/x-msnmsgr-transreqbody" ||
slpMessage.ContentType == "application/x-msnmsgr-transrespbody" ||
slpMessage.ContentType == "application/x-msnmsgr-transdestaddrupdate")))
{
SendOnePacket(session, remote, remoteGuid, p2pMessage);
}
else
{
bridgingOffsets.Add(buffer.Length.ToString());
buffer = NetworkMessage.AppendArray(buffer, p2pMessage.GetBytes(true));
int transId = nsmp.IncreaseTransactionID();
userStates.Add(transId);
lock (p2pAckMessages)
p2pAckMessages[transId] = new P2PMessageSessionEventArgs(p2pMessage, session);
//mmMessage.ContentHeaders[MIMEContentHeaders.Pipe] = PackageNo.ToString();
}
}
if (buffer.Length > 0)
{
mmMessage.ContentHeaders[MIMEContentHeaders.BridgingOffsets] = String.Join(",", bridgingOffsets.ToArray());
mmMessage.InnerBody = buffer;
int transId2 = nsmp.IncreaseTransactionID();
userStates.Add(transId2);
NSMessage sdgPayload = new NSMessage("SDG");
sdgPayload.TransactionID = transId2;
sdgPayload.InnerMessage = mmMessage;
nsmp.Processor.Send(sdgPayload.GetBytes(), userStates.ToArray());
}
}
public void Enqueue(Contact remote, Guid remoteGuid, P2PMessage message)
{
base.Enqueue(new P2PSendItem(remote, remoteGuid, message));
}
/// <summary>
/// Send a P2P Message to the specified P2PSession.
/// </summary>
/// <param name="session">
/// The application layer, which is a <see cref="P2PSession"/>
/// </param>
/// <param name="remote">
/// he receiver <see cref="Contact"/>
/// </param>
/// <param name="remoteGuid">
/// A <see cref="Guid"/>
/// </param>
/// <param name="msg">
/// he <see cref="P2PMessage"/> to be sent.
/// </param>
/// <param name="ackTimeout">
/// The maximum time to wait for an ACK. <see cref="System.Int32"/>
/// </param>
/// <param name="ackHandler">
/// The <see cref="AckHandler"/> to handle the ACK.
/// </param>
public virtual void Send(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage msg, int ackTimeout, AckHandler ackHandler)
{
if (remote == null)
throw new ArgumentNullException("remote");
P2PMessage[] msgs = SetSequenceNumberAndRegisterAck(session, remote, msg, ackHandler, ackTimeout);
if (session == null)
{
if (!IsOpen)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceError,
"Send called with no session on a closed bridge", GetType().Name);
return;
}
// Bypass queueing
foreach (P2PMessage m in msgs)
{
SendOnePacket(null, remote, remoteGuid, m);
}
return;
}
if (!SuitableFor(session))
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceError,
"Send called with a session this bridge is not suitable for", GetType().Name);
return;
}
lock (sendQueues)
{
if (!sendQueues.ContainsKey(session))
sendQueues[session] = new P2PSendQueue();
}
lock (sendQueues[session])
{
foreach (P2PMessage m in msgs)
sendQueues[session].Enqueue(remote, remoteGuid, m);
}
ProcessSendQueues();
}
public P2PDataMessage(P2PMessage copy)
: base(copy)
{
}
internal bool HandleRAK(Contact source, Guid sourceGuid, P2PMessage msg)
{
bool requireAck = false;
if (msg.Header.RequireAck)
{
requireAck = true;
P2PMessage ack = msg.CreateAcknowledgement();
if (ack.Header.RequireAck)
{
// SYN
Send(null, source, sourceGuid, ack, DefaultTimeout, delegate(P2PMessage sync)
{
SyncId = sync.Header.AckIdentifier;
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
String.Format("SYNC completed for: {0}", this), GetType().Name);
});
}
else
{
// ACK
Send(null, source, sourceGuid, ack);
}
}
return requireAck;
}
private static void ProcessDCRespInvite(SLPMessage message, NSMessageHandler ns, P2PSession startupSession)
{
MimeDictionary bodyValues = message.BodyValues;
// Check the protocol
if (bodyValues.ContainsKey("Bridge") &&
bodyValues["Bridge"].ToString() == "TCPv1" &&
bodyValues.ContainsKey("Listening") &&
bodyValues["Listening"].ToString().ToLowerInvariant().IndexOf("true") >= 0)
{
Contact remote = ns.ContactList.GetContactWithCreate(message.FromEmailAccount, IMAddressInfoType.WindowsLive);
Guid remoteGuid = message.FromEndPoint;
DCNonceType dcNonceType;
Guid remoteNonce = ParseDCNonce(message.BodyValues, out dcNonceType);
bool hashed = (dcNonceType == DCNonceType.Sha1);
Guid replyGuid = hashed ? remote.dcPlainKey : remoteNonce;
IPEndPoint[] selectedPoint = SelectIPEndPoint(bodyValues, ns);
if (selectedPoint != null && selectedPoint.Length > 0)
{
P2PVersion ver = message.P2PVersion;
// We must connect to the remote client
ConnectivitySettings settings = new ConnectivitySettings();
settings.EndPoints = selectedPoint;
remote.DirectBridge = CreateDirectConnection(remote, remoteGuid, ver, settings, replyGuid, remoteNonce, hashed, ns, startupSession);
bool needConnectingEndpointInfo;
if (bodyValues.ContainsKey("NeedConnectingEndpointInfo") &&
bool.TryParse(bodyValues["NeedConnectingEndpointInfo"], out needConnectingEndpointInfo) &&
needConnectingEndpointInfo == true)
{
IPEndPoint ipep = ((TCPv1Bridge)remote.DirectBridge).LocalEndPoint;
string desc = "stroPdnAsrddAlanretnI4vPI";
char[] rev = ipep.ToString().ToCharArray();
Array.Reverse(rev);
string ipandport = new string(rev);
SLPRequestMessage slpResponseMessage = new SLPRequestMessage(message.Source, MSNSLPRequestMethod.ACK);
slpResponseMessage.Source = message.Target;
slpResponseMessage.Via = message.Via;
slpResponseMessage.CSeq = 0;
slpResponseMessage.CallId = Guid.Empty;
slpResponseMessage.MaxForwards = 0;
slpResponseMessage.ContentType = @"application/x-msnmsgr-transdestaddrupdate";
slpResponseMessage.BodyValues[desc] = ipandport;
slpResponseMessage.BodyValues["Nat-Trav-Msg-Type"] = "WLX-Nat-Trav-Msg-Updated-Connecting-Port";
P2PMessage msg = new P2PMessage(ver);
msg.InnerMessage = slpResponseMessage;
ns.SDGBridge.Send(null, remote, remoteGuid, msg);
}
return;
}
}
if (startupSession != null)
startupSession.DirectNegotiationFailed();
}
/// <summary>
/// Split big P2PMessages to transport over sb or dc.
/// </summary>
/// <param name="maxSize"></param>
/// <returns></returns>
public P2PMessage[] SplitMessage(int maxSize)
{
uint payloadMessageSize = 0;
if (Version == P2PVersion.P2PV1)
{
payloadMessageSize = V1Header.MessageSize;
}
if (Version == P2PVersion.P2PV2)
{
payloadMessageSize = (uint)V2Header.MessageSize - (uint)V2Header.DataPacketHeaderLength;
}
if (payloadMessageSize <= maxSize)
{
return new P2PMessage[] { this }
}
;
List <P2PMessage> chunks = new List <P2PMessage>();
byte[] totalMessage = (InnerBody != null)
? InnerBody
: InnerMessage.GetBytes();
long offset = 0;
if (Version == P2PVersion.P2PV1)
{
while (offset < totalMessage.LongLength)
{
P2PMessage chunkMessage = new P2PMessage(Version);
uint messageSize = (uint)Math.Min((uint)maxSize, (totalMessage.LongLength - offset));
byte[] chunk = new byte[messageSize];
Buffer.BlockCopy(totalMessage, (int)offset, chunk, 0, (int)messageSize);
chunkMessage.V1Header.Flags = V1Header.Flags;
chunkMessage.V1Header.AckIdentifier = V1Header.AckIdentifier;
chunkMessage.V1Header.AckTotalSize = V1Header.AckTotalSize;
chunkMessage.V1Header.Identifier = V1Header.Identifier;
chunkMessage.V1Header.SessionId = V1Header.SessionId;
chunkMessage.V1Header.TotalSize = V1Header.TotalSize;
chunkMessage.V1Header.Offset = (ulong)offset;
chunkMessage.V1Header.MessageSize = messageSize;
chunkMessage.InnerBody = chunk;
chunkMessage.V1Header.AckSessionId = V1Header.AckSessionId;
chunkMessage.Footer = Footer;
chunkMessage.PrepareMessage();
chunks.Add(chunkMessage);
offset += messageSize;
}
}
if (Version == P2PVersion.P2PV2)
{
uint nextId = Header.Identifier;
long dataRemain = (long)V2Header.DataRemaining;
while (offset < totalMessage.LongLength)
{
P2PMessage chunkMessage = new P2PMessage(Version);
int maxDataSize = maxSize;
if (offset == 0 && V2Header.HeaderTLVs.Count > 0)
{
foreach (KeyValuePair <byte, byte[]> keyvalue in V2Header.HeaderTLVs)
{
chunkMessage.V2Header.HeaderTLVs[keyvalue.Key] = keyvalue.Value;
}
maxDataSize = maxSize - chunkMessage.V2Header.HeaderLength;
}
uint dataSize = (uint)Math.Min((uint)maxDataSize, (totalMessage.LongLength - offset));
byte[] chunk = new byte[dataSize];
Buffer.BlockCopy(totalMessage, (int)offset, chunk, 0, (int)dataSize);
if (offset == 0)
{
chunkMessage.V2Header.OperationCode = V2Header.OperationCode;
}
chunkMessage.V2Header.SessionId = V2Header.SessionId;
chunkMessage.V2Header.TFCombination = V2Header.TFCombination;
chunkMessage.V2Header.PackageNumber = V2Header.PackageNumber;
if (totalMessage.LongLength + dataRemain - (dataSize + offset) > 0)
{
chunkMessage.V2Header.DataRemaining = (ulong)(totalMessage.LongLength + dataRemain - (dataSize + offset));
}
if ((offset != 0) &&
TFCombination.First == (V2Header.TFCombination & TFCombination.First))
{
chunkMessage.V2Header.TFCombination = (TFCombination)(V2Header.TFCombination - TFCombination.First);
}
chunkMessage.InnerBody = chunk;
chunkMessage.Header.Identifier = nextId;
nextId += chunkMessage.Header.MessageSize;
chunks.Add(chunkMessage);
offset += dataSize;
}
}
return(chunks.ToArray());
}
/// <summary>
/// Sends a P2P message.
/// </summary>
/// <param name="p2pMessage"></param>
public void SendMessage(P2PMessage p2pMessage)
{
SendMessage(p2pMessage, 0, null);
}
/// <summary>
/// Sends a message with the specified <see cref="P2PMessage"/> and <see cref="AckHandler"/>.
/// </summary>
public virtual void SendMessage(P2PMessage p2pMessage, int ackTimeout, AckHandler ackHandler)
{
Debug.Assert(p2pMessage.Version == version);
p2pMessage.Header.SessionId = p2pSession.SessionId;
// If not an ack, set the footer (p2pv1 only)
if (p2pMessage.Version == P2PVersion.P2PV1 && (p2pMessage.V1Header.Flags & P2PFlag.Acknowledgement) != P2PFlag.Acknowledgement)
p2pMessage.Footer = ApplicationId;
p2pSession.Send(p2pMessage, ackTimeout, ackHandler);
}
private P2PMessage[] SetSequenceNumberAndRegisterAck(P2PSession session, Contact remote, P2PMessage p2pMessage, AckHandler ackHandler, int timeout)
{
if (p2pMessage.Header.Identifier == 0)
{
if (p2pMessage.Version == P2PVersion.P2PV1)
{
p2pMessage.Header.Identifier = ++sequenceId;
}
else if (p2pMessage.Version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.Identifier = sequenceId;
}
}
if (p2pMessage.Version == P2PVersion.P2PV1 && p2pMessage.V1Header.AckSessionId == 0)
{
p2pMessage.V1Header.AckSessionId = (uint)new Random().Next(50000, int.MaxValue);
}
if (p2pMessage.Version == P2PVersion.P2PV2 && p2pMessage.V2Header.PackageNumber == 0)
{
p2pMessage.V2Header.PackageNumber = packageNo;
}
P2PMessage[] msgs = p2pMessage.SplitMessage(MaxDataSize);
if (p2pMessage.Version == P2PVersion.P2PV2)
{
// Correct local sequence no
P2PMessage lastMsg = msgs[msgs.Length - 1];
SequenceId = lastMsg.V2Header.Identifier + lastMsg.V2Header.MessageSize;
}
if (ackHandler != null)
{
P2PMessage firstMessage = msgs[0];
RegisterAckHandler(new P2PAckMessageEventArgs(firstMessage, ackHandler, timeout));
}
if (session != null)
{
session.LocalIdentifier = SequenceId;
}
return msgs;
}
protected abstract void SendOnePacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage msg);
internal void SendSLPStatus(P2PBridge bridge, P2PMessage msg, Contact dest, Guid destGuid, int code, string phrase)
{
string target = dest.Account.ToLowerInvariant();
if (msg.Version == P2PVersion.P2PV2)
{
target += ";" + destGuid.ToString("B");
}
SLPMessage slp = new SLPStatusMessage(target, code, phrase);
if (msg.IsSLPData)
{
SLPMessage msgSLP = msg.InnerMessage as SLPMessage;
slp.Branch = msgSLP.Branch;
slp.CallId = msgSLP.CallId;
slp.Source = msgSLP.Target;
slp.ContentType = msgSLP.ContentType;
if (msgSLP.BodyValues.ContainsKey("SessionID"))
{
slp.BodyValues["SessionID"] = msgSLP.BodyValues["SessionID"];
}
}
else
slp.ContentType = "null";
P2PMessage response = new P2PMessage(msg.Version);
response.InnerMessage = slp;
if (msg.Version == P2PVersion.P2PV1)
{
response.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
else if (msg.Version == P2PVersion.P2PV2)
{
response.V2Header.OperationCode = (byte)OperationCode.None;
response.V2Header.TFCombination = TFCombination.First;
}
bridge.Send(null, dest, destGuid, response);
}
protected override void SendOnePacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage p2pMessage)
{
if (remote == null)
{
return;
}
string to = ((int)remote.ClientType).ToString() + ":" + remote.Account;
string from = ((int)NSMessageHandler.Owner.ClientType).ToString() + ":" + NSMessageHandler.Owner.Account;
MultiMimeMessage mmMessage = new MultiMimeMessage(to, from);
mmMessage.RoutingHeaders[MIMERoutingHeaders.From][MIMERoutingHeaders.EPID] = NSMessageHandler.MachineGuid.ToString("B").ToLowerInvariant();
mmMessage.RoutingHeaders[MIMERoutingHeaders.To][MIMERoutingHeaders.EPID] = remoteGuid.ToString("B").ToLowerInvariant();
mmMessage.RoutingHeaders[MIMERoutingHeaders.ServiceChannel] = "PE";
mmMessage.RoutingHeaders[MIMERoutingHeaders.Options] = "0";
mmMessage.ContentKeyVersion = "2.0";
SLPMessage slpMessage = p2pMessage.IsSLPData ? p2pMessage.InnerMessage as SLPMessage : null;
if (slpMessage != null &&
((slpMessage.ContentType == "application/x-msnmsgr-transreqbody" ||
slpMessage.ContentType == "application/x-msnmsgr-transrespbody" ||
slpMessage.ContentType == "application/x-msnmsgr-transdestaddrupdate")))
{
mmMessage.ContentHeaders[MIMEContentHeaders.MessageType] = MessageTypes.SignalP2P;
mmMessage.InnerBody = slpMessage.GetBytes(false);
mmMessage.InnerMessage = slpMessage;
}
else
{
mmMessage.ContentHeaders[MIMEContentHeaders.ContentType] = "application/x-msnmsgrp2p";
mmMessage.ContentHeaders[MIMEContentHeaders.ContentTransferEncoding] = "binary";
mmMessage.ContentHeaders[MIMEContentHeaders.MessageType] = MessageTypes.Data;
//mmMessage.ContentHeaders[MIMEContentHeaders.Pipe] = PackageNo.ToString();
mmMessage.ContentHeaders[MIMEContentHeaders.BridgingOffsets] = "0";
mmMessage.InnerBody = p2pMessage.GetBytes(true);
mmMessage.InnerMessage = p2pMessage;
}
NSMessageProcessor nsmp = (NSMessageProcessor)NSMessageHandler.MessageProcessor;
int transId = nsmp.IncreaseTransactionID();
lock (p2pAckMessages)
p2pAckMessages[transId] = new P2PMessageSessionEventArgs(p2pMessage, session);
NSMessage sdgPayload = new NSMessage("SDG");
sdgPayload.TransactionID = transId;
sdgPayload.InnerMessage = mmMessage;
nsmp.SendMessage(sdgPayload, sdgPayload.TransactionID);
}
protected override void SendOnePacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage p2pMessage)
{
if (remote == null)
return;
string to = ((int)remote.ClientType).ToString() + ":" + remote.Account;
string from = ((int)NSMessageHandler.Owner.ClientType).ToString() + ":" + NSMessageHandler.Owner.Account;
MultiMimeMessage mmMessage = new MultiMimeMessage(to, from);
mmMessage.RoutingHeaders[MIMERoutingHeaders.From][MIMERoutingHeaders.EPID] = NSMessageHandler.MachineGuid.ToString("B").ToLowerInvariant();
mmMessage.RoutingHeaders[MIMERoutingHeaders.To][MIMERoutingHeaders.EPID] = remoteGuid.ToString("B").ToLowerInvariant();
mmMessage.RoutingHeaders[MIMERoutingHeaders.ServiceChannel] = "PE";
mmMessage.RoutingHeaders[MIMERoutingHeaders.Options] = "0";
mmMessage.ContentKeyVersion = "2.0";
SLPMessage slpMessage = p2pMessage.IsSLPData ? p2pMessage.InnerMessage as SLPMessage : null;
if (slpMessage != null &&
((slpMessage.ContentType == "application/x-msnmsgr-transreqbody" ||
slpMessage.ContentType == "application/x-msnmsgr-transrespbody" ||
slpMessage.ContentType == "application/x-msnmsgr-transdestaddrupdate")))
{
mmMessage.ContentHeaders[MIMEContentHeaders.MessageType] = MessageTypes.SignalP2P;
mmMessage.InnerBody = slpMessage.GetBytes(false);
mmMessage.InnerMessage = slpMessage;
}
else
{
mmMessage.ContentHeaders[MIMEContentHeaders.ContentType] = "application/x-msnmsgrp2p";
mmMessage.ContentHeaders[MIMEContentHeaders.ContentTransferEncoding] = "binary";
mmMessage.ContentHeaders[MIMEContentHeaders.MessageType] = MessageTypes.Data;
//mmMessage.ContentHeaders[MIMEContentHeaders.Pipe] = PackageNo.ToString();
mmMessage.ContentHeaders[MIMEContentHeaders.BridgingOffsets] = "0";
mmMessage.InnerBody = p2pMessage.GetBytes(true);
mmMessage.InnerMessage = p2pMessage;
}
NSMessageProcessor nsmp = (NSMessageProcessor)NSMessageHandler.MessageProcessor;
int transId = nsmp.IncreaseTransactionID();
lock (p2pAckMessages)
p2pAckMessages[transId] = new P2PMessageSessionEventArgs(p2pMessage, session);
NSMessage sdgPayload = new NSMessage("SDG");
sdgPayload.TransactionID = transId;
sdgPayload.InnerMessage = mmMessage;
nsmp.SendMessage(sdgPayload, sdgPayload.TransactionID);
}
internal bool SendDirectInvite()
{
// Skip if we're currently using a TCPBridge.
if (Remote.DirectBridge != null && Remote.DirectBridge.IsOpen)
return false;
int netId;
string connectionType = ConnectionType(nsMessageHandler, out netId);
P2PMessage p2pMessage = new P2PMessage(Version);
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
String.Format("Connection type set to {0} for session {1}", connectionType, SessionId.ToString()));
// Create the message
SLPRequestMessage slpMessage = new SLPRequestMessage(RemoteContactEPIDString, MSNSLPRequestMethod.INVITE);
slpMessage.Source = LocalContactEPIDString;
slpMessage.CSeq = 0;
slpMessage.CallId = Invitation.CallId;
slpMessage.MaxForwards = 0;
slpMessage.ContentType = "application/x-msnmsgr-transreqbody";
slpMessage.BodyValues["Bridges"] = "TCPv1 SBBridge";
slpMessage.BodyValues["Capabilities-Flags"] = "1";
slpMessage.BodyValues["NetID"] = netId.ToString(CultureInfo.InvariantCulture);
slpMessage.BodyValues["Conn-Type"] = connectionType;
slpMessage.BodyValues["TCP-Conn-Type"] = connectionType;
slpMessage.BodyValues["UPnPNat"] = "false"; // UPNP Enabled
slpMessage.BodyValues["ICF"] = (connectionType == "Firewall").ToString(); // Firewall enabled
slpMessage.BodyValues["Nat-Trav-Msg-Type"] = "WLX-Nat-Trav-Msg-Direct-Connect-Req";
// We support Hashed-Nonce ( 2 way handshake )
Remote.GenerateNewDCKeys();
slpMessage.BodyValues["Hashed-Nonce"] = Remote.dcLocalHashedNonce.ToString("B").ToUpper(CultureInfo.InvariantCulture);
p2pMessage.InnerMessage = slpMessage;
if (p2pMessage.Version == P2PVersion.P2PV2)
{
p2pMessage.V2Header.TFCombination = TFCombination.First;
}
else if (p2pMessage.Version == P2PVersion.P2PV1)
{
p2pMessage.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
// These 3 step is very important...
// 1- Stop sending for this session on sdgbridge until we receive a response to the direct invite or the timeout expires
nsMessageHandler.SDGBridge.StopSending(this);
// 2- Setup a dc timer.
SetupDCTimer();
// 3- Don't pass p2psession to the sdg bridge. Because, sdgbridge stopped this session.
nsMessageHandler.SDGBridge.Send(null /*must be null to bypass queueing*/,
Remote, RemoteContactEndPointID, p2pMessage);
return true;
}
/// <summary>
/// Copy constructor. Creates a shallow copy of the properties of the P2PMessage.
/// </summary>
/// <param name="message"></param>
public P2PDCMessage(P2PMessage message)
: base(message)
{
}
private static void ProcessDCReqInvite(SLPMessage message, NSMessageHandler ns, P2PSession startupSession)
{
if (startupSession != null && startupSession.Bridge != null &&
startupSession.Bridge is TCPv1Bridge)
{
return; // We are using a dc bridge already. Don't allow second one.
}
if (message.BodyValues.ContainsKey("Bridges") &&
message.BodyValues["Bridges"].ToString().Contains("TCPv1"))
{
SLPStatusMessage slpMessage = new SLPStatusMessage(message.Source, 200, "OK");
slpMessage.Target = message.Source;
slpMessage.Source = message.Target;
slpMessage.Branch = message.Branch;
slpMessage.CSeq = 1;
slpMessage.CallId = message.CallId;
slpMessage.MaxForwards = 0;
slpMessage.ContentType = "application/x-msnmsgr-transrespbody";
slpMessage.BodyValues["Bridge"] = "TCPv1";
Guid remoteGuid = message.FromEndPoint;
Contact remote = ns.ContactList.GetContactWithCreate(message.FromEmailAccount, IMAddressInfoType.WindowsLive);
DCNonceType dcNonceType;
Guid remoteNonce = ParseDCNonce(message.BodyValues, out dcNonceType);
if (remoteNonce == Guid.Empty) // Plain
remoteNonce = remote.dcPlainKey;
bool hashed = (dcNonceType == DCNonceType.Sha1);
string nonceFieldName = hashed ? "Hashed-Nonce" : "Nonce";
Guid myHashedNonce = hashed ? remote.dcLocalHashedNonce : remoteNonce;
Guid myPlainNonce = remote.dcPlainKey;
if (dcNonceType == DCNonceType.Sha1)
{
// Remote contact supports Hashed-Nonce
remote.dcType = dcNonceType;
remote.dcRemoteHashedNonce = remoteNonce;
}
else
{
remote.dcType = DCNonceType.Plain;
myPlainNonce = remote.dcPlainKey = remote.dcLocalHashedNonce = remote.dcRemoteHashedNonce = remoteNonce;
}
// Find host by name
IPAddress ipAddress = ns.LocalEndPoint.Address;
int port;
P2PVersion ver = message.P2PVersion;
if (Settings.DisableP2PDirectConnections ||
false == ipAddress.Equals(ns.ExternalEndPoint.Address) ||
(0 == (port = GetNextDirectConnectionPort(ipAddress))))
{
slpMessage.BodyValues["Listening"] = "false";
slpMessage.BodyValues[nonceFieldName] = Guid.Empty.ToString("B").ToUpper(CultureInfo.InvariantCulture);
}
else
{
// Let's listen
remote.DirectBridge = ListenForDirectConnection(remote, remoteGuid, ns, ver, startupSession, ipAddress, port, myPlainNonce, remoteNonce, hashed);
slpMessage.BodyValues["Listening"] = "true";
slpMessage.BodyValues["Capabilities-Flags"] = "1";
slpMessage.BodyValues["IPv6-global"] = string.Empty;
slpMessage.BodyValues["Nat-Trav-Msg-Type"] = "WLX-Nat-Trav-Msg-Direct-Connect-Resp";
slpMessage.BodyValues["UPnPNat"] = "false";
slpMessage.BodyValues["NeedConnectingEndpointInfo"] = "true";
slpMessage.BodyValues["Conn-Type"] = "Direct-Connect";
slpMessage.BodyValues["TCP-Conn-Type"] = "Direct-Connect";
slpMessage.BodyValues[nonceFieldName] = myHashedNonce.ToString("B").ToUpper(CultureInfo.InvariantCulture);
slpMessage.BodyValues["IPv4Internal-Addrs"] = ipAddress.ToString();
slpMessage.BodyValues["IPv4Internal-Port"] = port.ToString(CultureInfo.InvariantCulture);
// check if client is behind firewall (NAT-ted)
// if so, send the public ip also the client, so it can try to connect to that ip
if (!ns.ExternalEndPoint.Address.Equals(ns.LocalEndPoint.Address))
{
slpMessage.BodyValues["IPv4External-Addrs"] = ns.ExternalEndPoint.Address.ToString();
slpMessage.BodyValues["IPv4External-Port"] = port.ToString(CultureInfo.InvariantCulture);
}
}
P2PMessage p2pMessage = new P2PMessage(ver);
p2pMessage.InnerMessage = slpMessage;
if (ver == P2PVersion.P2PV2)
{
p2pMessage.V2Header.TFCombination = TFCombination.First;
}
else if (ver == P2PVersion.P2PV1)
{
p2pMessage.V1Header.Flags = P2PFlag.MSNSLPInfo;
}
if (startupSession != null)
{
startupSession.SetupDCTimer();
startupSession.Bridge.Send(null, startupSession.Remote, startupSession.RemoteContactEndPointID, p2pMessage);
}
else
{
ns.SDGBridge.Send(null, remote, remoteGuid, p2pMessage);
}
}
else
{
if (startupSession != null)
startupSession.DirectNegotiationFailed();
}
}
public P2PMessage(P2PMessage message)
: this(message.Version)
{
Header.SessionId = message.Header.SessionId;
Header.Identifier = message.Header.Identifier;
Header.TotalSize = message.Header.TotalSize;
Header.MessageSize = message.Header.MessageSize;
Header.AckIdentifier = message.Header.AckIdentifier;
if (message.Version == P2PVersion.P2PV1)
{
V1Header.Offset = message.V1Header.Offset;
V1Header.Flags = message.V1Header.Flags;
V1Header.AckSessionId = message.V1Header.AckSessionId;
V1Header.AckTotalSize = message.V1Header.AckTotalSize;
}
else if (message.Version == P2PVersion.P2PV2)
{
V2Header.OperationCode = message.V2Header.OperationCode;
V2Header.TFCombination = message.V2Header.TFCombination;
V2Header.PackageNumber = message.V2Header.PackageNumber;
V2Header.DataRemaining = message.V2Header.DataRemaining;
if (message.V2Header.HeaderTLVs.Count > 0)
{
foreach (KeyValuePair<byte, byte[]> keyvalue in message.V2Header.HeaderTLVs)
{
V2Header.HeaderTLVs[keyvalue.Key] = keyvalue.Value;
}
}
if (message.V2Header.DataPacketTLVs.Count > 0)
{
foreach (KeyValuePair<byte, byte[]> keyvalue in message.V2Header.DataPacketTLVs)
{
V2Header.DataPacketTLVs[keyvalue.Key] = keyvalue.Value;
}
}
}
if (message.InnerMessage != null)
InnerMessage = message.InnerMessage;
if (message.InnerBody != null)
InnerBody = message.InnerBody;
Footer = message.Footer;
}
protected virtual void SendMultiPacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage[] sendList)
{
foreach (P2PMessage p2pMessage in sendList)
{
SendOnePacket(session, remote, remoteGuid, p2pMessage);
}
}
protected override void SendOnePacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage msg)
{
directConnection.SendMessage(msg, new P2PMessageSessionEventArgs(msg, session));
}
public void Send(P2PMessage p2pMessage, AckHandler ackHandler)
{
Send(p2pMessage, P2PBridge.DefaultTimeout, ackHandler);
}
protected override void SendOnePacket(P2PSession session, Contact remote, Guid remoteGuid, P2PMessage msg)
{
directConnection.SendMessage(msg, new P2PMessageSessionEventArgs(msg, session));
}
/// <summary>
/// Copy constructor. Creates a shallow copy of the properties of the P2PMessage.
/// </summary>
/// <param name="message"></param>
public P2PDCMessage(P2PMessage message)
: base(message)
{
}
/// <summary>
/// Buffers incompleted P2PMessage SLP messages. Ignores data and control messages.
/// </summary>
/// <param name="p2pMessage"></param>
/// <returns>
/// true if the P2PMessage is buffering (not completed) or invalid packet received;
/// false if the p2p message fully buffered or no need to buffer.
/// </returns>
public bool BufferMessage(ref P2PMessage p2pMessage)
{
// P2PV1 and P2PV2 check
if (p2pMessage.Header.MessageSize == 0 || // Ack message or Unsplitted
p2pMessage.Header.SessionId > 0) // Data message
{
return false; // No need to buffer
}
// P2PV2 pooling
if (p2pMessage.Version == P2PVersion.P2PV2)
{
if ((p2pMessage.V2Header.TFCombination == TFCombination.First && p2pMessage.V2Header.DataRemaining == 0) || // Unsplitted SLP message or data preparation message
(p2pMessage.V2Header.TFCombination > TFCombination.First)) // Data message
{
return false; // No need to buffer
}
// First splitted SLP message.
if (p2pMessage.V2Header.TFCombination == TFCombination.First &&
p2pMessage.V2Header.DataRemaining > 0)
{
P2PMessage totalMessage = new P2PMessage(p2pMessage); // Copy it
ulong totalSize = (ulong)(p2pMessage.V2Header.MessageSize - p2pMessage.V2Header.DataPacketHeaderLength) +
p2pMessage.V2Header.DataRemaining;
totalMessage.InnerBody = new byte[totalSize]; // Allocate buffer as needed
Array.Copy(p2pMessage.InnerBody, 0, totalMessage.InnerBody, (long)0, (long)p2pMessage.InnerBody.Length);
lock (incompletedP2PV2Messages)
incompletedP2PV2Messages[p2pMessage.V2Header.Identifier + p2pMessage.V2Header.MessageSize] = totalMessage;
return true; // Buffering
}
// Other splitted SLP messages
if (p2pMessage.V2Header.TFCombination == TFCombination.None)
{
lock (incompletedP2PV2Messages)
{
if (incompletedP2PV2Messages.ContainsKey(p2pMessage.V2Header.Identifier))
{
if (incompletedP2PV2Messages[p2pMessage.V2Header.Identifier].V2Header.PackageNumber == p2pMessage.V2Header.PackageNumber)
{
P2PMessage totalMessage = incompletedP2PV2Messages[p2pMessage.V2Header.Identifier];
ulong dataSize = Math.Min(((ulong)(p2pMessage.V2Header.MessageSize - p2pMessage.V2Header.DataPacketHeaderLength)), totalMessage.V2Header.DataRemaining);
ulong offSet = ((ulong)totalMessage.InnerBody.LongLength) - totalMessage.V2Header.DataRemaining;
// Check range and buffer overflow...
if (((p2pMessage.V2Header.DataRemaining + (ulong)dataSize) == totalMessage.V2Header.DataRemaining) &&
(ulong)(dataSize + offSet + p2pMessage.V2Header.DataRemaining) == (ulong)totalMessage.InnerBody.LongLength)
{
Array.Copy(p2pMessage.InnerBody, 0, totalMessage.InnerBody, (long)offSet, (long)dataSize);
uint originalIdentifier = p2pMessage.V2Header.Identifier;
uint newIdentifier = p2pMessage.V2Header.Identifier + p2pMessage.V2Header.MessageSize;
totalMessage.V2Header.DataRemaining = p2pMessage.V2Header.DataRemaining;
totalMessage.V2Header.Identifier = newIdentifier;
if (originalIdentifier != newIdentifier)
{
incompletedP2PV2Messages.Remove(originalIdentifier);
}
// Don't debug p2p inner packet (SLP) here.
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
" Buffering splitted SLP message! DataRemaining:" + totalMessage.V2Header.DataRemaining +
" NewIdentifier: " + newIdentifier);
if (p2pMessage.V2Header.DataRemaining > 0)
{
// Don't debug p2p packet here. Because it hasn't completed yet and SLPMessage.Parse() fails...
incompletedP2PV2Messages[newIdentifier] = totalMessage;
return true; // Buffering
}
else // Last part
{
totalMessage.InnerBody = totalMessage.InnerBody; // Refresh... DataRemaining=0 deletes data headers.
totalMessage.V2Header.Identifier = newIdentifier - totalMessage.Header.MessageSize;
Trace.WriteLineIf(Settings.TraceSwitch.TraceInfo,
"A splitted message was combined :\r\n" +
totalMessage.ToDebugString());
p2pMessage = totalMessage;
return false; // We have the whole message
}
}
}
// Invalid packet received!!! Ignore and delete it...
incompletedP2PV2Messages.Remove(p2pMessage.V2Header.Identifier);
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
"INVALID P2PV2 PACKET received!!! Ignored and deleted:\r\n" +
p2pMessage.ToDebugString());
}
}
}
}
else // P2PV1 pooling
{
if ((p2pMessage.V1Header.MessageSize == p2pMessage.V1Header.TotalSize) || // Whole data
((p2pMessage.V1Header.Flags & P2PFlag.Data) == P2PFlag.Data)) // Data message
{
return false; // No need to buffer
}
lock (incompletedP2PV1Messages)
{
if (false == incompletedP2PV1Messages.ContainsKey(p2pMessage.Header.Identifier))
{
byte[] totalPayload = new byte[p2pMessage.V1Header.TotalSize];
Array.Copy(p2pMessage.InnerBody, 0, totalPayload, (long)p2pMessage.V1Header.Offset, (long)p2pMessage.V1Header.MessageSize);
P2PMessage copyMessage = new P2PMessage(p2pMessage);
copyMessage.InnerBody = totalPayload;
copyMessage.V1Header.Offset = p2pMessage.V1Header.Offset + p2pMessage.V1Header.MessageSize;
incompletedP2PV1Messages[p2pMessage.Header.Identifier] = copyMessage;
return true; // Buffering
}
P2PMessage totalMessage = incompletedP2PV1Messages[p2pMessage.Header.Identifier];
if (p2pMessage.V1Header.TotalSize == totalMessage.V1Header.TotalSize &&
(p2pMessage.V1Header.Offset + p2pMessage.V1Header.MessageSize) <= totalMessage.Header.TotalSize)
{
Array.Copy(p2pMessage.InnerBody, 0, totalMessage.InnerBody, (long)p2pMessage.V1Header.Offset, (long)p2pMessage.V1Header.MessageSize);
totalMessage.V1Header.Offset = p2pMessage.V1Header.Offset + p2pMessage.V1Header.MessageSize;
// Last packet
if (totalMessage.V1Header.Offset == p2pMessage.V1Header.TotalSize)
{
totalMessage.V1Header.Offset = 0;
incompletedP2PV1Messages.Remove(p2pMessage.Header.Identifier);
p2pMessage = totalMessage;
return false; // We have the whole message
}
return true; // Buffering
}
// Invalid packet received!!! Ignore and delete it...
incompletedP2PV1Messages.Remove(p2pMessage.Header.Identifier);
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
"INVALID P2PV1 PACKET received!!! Ignored and deleted:\r\n" +
p2pMessage.ToDebugString());
}
}
return true; // Invalid packet, don't kill me.
}
public P2PSendItem(Contact remote, Guid remoteGuid, P2PMessage message)
{
Remote = remote;
RemoteGuid = remoteGuid;
P2PMessage = message;
}
public P2PMessageEventArgs(P2PMessage p2pMessage)
{
this.p2pMessage = p2pMessage;
}
internal bool HandleACK(P2PMessage p2pMessage)
{
bool isAckOrNak = false;
if (p2pMessage.Header.IsAcknowledgement || p2pMessage.Header.IsNegativeAck)
{
P2PAckMessageEventArgs e = null;
uint ackNakId = 0;
isAckOrNak = true;
if (p2pMessage.Version == P2PVersion.P2PV1)
{
lock (ackHandlersV1)
{
if (ackHandlersV1.ContainsKey(p2pMessage.Header.AckIdentifier))
{
ackNakId = p2pMessage.Header.AckIdentifier;
e = ackHandlersV1[ackNakId];
ackHandlersV1.Remove(ackNakId);
}
}
}
else if (p2pMessage.Version == P2PVersion.P2PV2)
{
lock (ackHandlersV2)
{
if (ackHandlersV2.ContainsKey(p2pMessage.Header.AckIdentifier))
{
ackNakId = p2pMessage.Header.AckIdentifier;
e = ackHandlersV2[ackNakId];
ackHandlersV2.Remove(ackNakId);
}
else if (ackHandlersV2.ContainsKey(p2pMessage.V2Header.NakIdentifier))
{
ackNakId = p2pMessage.V2Header.NakIdentifier;
e = ackHandlersV2[ackNakId];
ackHandlersV2.Remove(ackNakId);
}
}
}
if (ackNakId == 0)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("!!!!!! No AckHandler registered for ack/nak {0}:\r\n{1}", p2pMessage.Header.AckIdentifier, p2pMessage.ToDebugString()), GetType().Name);
}
else
{
if (e != null && e.AckHandler != null)
{
e.AckHandler(p2pMessage);
}
else
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("!!!!!! No AckHandler pair for ack {0}\r\n{1}", ackNakId, p2pMessage.ToDebugString()), GetType().Name);
}
}
}
return isAckOrNak;
}
public override void Start()
{
base.Start();
if (Sending)
{
ushort packNum = ++base.P2PSession.Bridge.PackageNo;
// Data prep
P2PDataMessage prepData = new P2PDataMessage(P2PVersion);
prepData.WritePreparationBytes();
if (P2PVersion == P2PVersion.P2PV2)
{
prepData.V2Header.TFCombination = TFCombination.First;
}
SendMessage(prepData);
Trace.WriteLineIf(Settings.TraceSwitch.TraceVerbose,
"Data prep sent. Sending whole data...", GetType().Name);
// All chunks
byte[] allData = new byte[msnObject.Size];
lock (objStream)
{
using (Stream s = objStream)
{
s.Position = 0;
s.Read(allData, 0, allData.Length);
}
}
P2PDataMessage msg = new P2PDataMessage(P2PVersion);
if (P2PVersion == P2PVersion.P2PV1)
{
msg.V1Header.Flags = P2PFlag.Data;
msg.V1Header.AckSessionId = (uint)new Random().Next(50, int.MaxValue);
}
else if (P2PVersion == P2PVersion.P2PV2)
{
msg.V2Header.TFCombination = TFCombination.MsnObject | TFCombination.First;
msg.V2Header.PackageNumber = packNum;
}
msg.InnerBody = allData;
if (P2PVersion == P2PVersion.P2PV1)
{
// Object transfer must be finish in MaxTimeout seconds. (p2pv1)
// Because ack is received after transfer finished.
SendMessage(msg, P2PBridge.MaxTimeout, delegate(P2PMessage ack)
{
OnTransferFinished(EventArgs.Empty);
// Close after remote client sends BYE.
});
}
else
{
SendMessage(msg, 0, null);
// Register the ACKHandler
P2PMessage rak = new P2PMessage(P2PVersion);
SendMessage(rak, P2PBridge.DefaultTimeout, delegate(P2PMessage ack)
{
OnTransferFinished(EventArgs.Empty);
// Close after remote client sends BYE.
});
}
}
else
{
objStream = new MemoryStream();
}
}
/// <summary>
/// Creates an acknowledgement message to this message.
/// </summary>
/// <returns></returns>
public virtual P2PMessage CreateAcknowledgement()
{
P2PMessage ack = new P2PMessage(Version);
ack.Header = Header.CreateAck();
if (Version == P2PVersion.P2PV1)
{
ack.Footer = Footer; //Keep the same as the message to acknowladge.
}
return ack;
}
public virtual void SendMessage(P2PMessage msg, P2PMessageSessionEventArgs se)
{
// if it is a regular message convert it
P2PDCMessage p2pMessage = msg as P2PDCMessage;
if (p2pMessage == null)
{
p2pMessage = new P2PDCMessage(msg);
}
// prepare the message
p2pMessage.PrepareMessage();
// this is very bloated!
Trace.WriteLineIf(Settings.TraceSwitch.TraceVerbose, "Outgoing message:\r\n" + p2pMessage.ToDebugString(), GetType().Name);
if (dcSocket != null)
Processor.SendSocketData(dcSocket, p2pMessage.GetBytes(), se);
else
Processor.Send(p2pMessage.GetBytes(), se);
}
private void OnSDGDataMessageReceived(MultiMimeMessage multiMimeMessage, Contact sender, Contact by, RoutingInfo routingInfo)
{
Guid senderEPID = routingInfo.SenderEndPointID;
P2PVersion p2pVer = senderEPID == Guid.Empty ? P2PVersion.P2PV1 : P2PVersion.P2PV2;
string[] offsets = multiMimeMessage.ContentHeaders.ContainsKey(MIMEContentHeaders.BridgingOffsets) ?
multiMimeMessage.ContentHeaders[MIMEContentHeaders.BridgingOffsets].ToString().Split(',') :
new string[] { "0" };
List<long> offsetList = new List<long>();
foreach (string os in offsets)
{
offsetList.Add(long.Parse(os));
}
P2PMessage p2pData = new P2PMessage(p2pVer);
P2PMessage[] p2pDatas = p2pData.CreateFromOffsets(offsetList.ToArray(), multiMimeMessage.InnerBody);
if (multiMimeMessage.ContentHeaders.ContainsKey(MIMEContentHeaders.Pipe))
{
SDGBridge.PackageNo = ushort.Parse(multiMimeMessage.ContentHeaders[MIMEContentHeaders.Pipe]);
}
foreach (P2PMessage m in p2pDatas)
{
SDGBridge.ProcessP2PMessage(sender, senderEPID, m);
}
}
public P2PMessage[] CreateFromOffsets(long[] offsets, byte[] allData)
{
List<P2PMessage> messages = new List<P2PMessage>(offsets.Length);
long offset = allData.Length;
for (int i = offsets.Length - 1; i >= 0; i--)
{
P2PMessage m = new P2PMessage(Version);
long length = offset - offsets[i];
byte[] part = new byte[length];
Array.Copy(allData, offsets[i], part, 0, length);
m.ParseBytes(part);
offset -= length;
messages.Add(m);
}
messages.Reverse();
return messages.ToArray();
}
public bool ProcessP2PMessage(P2PBridge bridge, Contact source, Guid sourceGuid, P2PMessage p2pMessage)
{
// 1) SLP BUFFERING: Combine splitted SLP messages
if (slpMessagePool.BufferMessage(ref p2pMessage))
{
// * Buffering: Not completed yet, we must wait next packets -OR-
// * Invalid packet received: Don't kill me, just ignore it...
return(true);
}
Trace.WriteLineIf(Settings.TraceSwitch.TraceVerbose,
String.Format("Received P2PMessage from {0}\r\n{1}", bridge.ToString(), p2pMessage.ToDebugString()), GetType().Name);
// 2) CHECK SLP: Check destination, source, endpoints
SLPMessage slp = p2pMessage.IsSLPData ? p2pMessage.InnerMessage as SLPMessage : null;
if (slp != null)
{
if (!slpHandler.CheckSLPMessage(bridge, source, sourceGuid, p2pMessage, slp))
{
return(true); // HANDLED, This SLP is not for us.
}
}
// 3) FIRST SLP MESSAGE: Create applications/sessions based on invitation
if (slp != null && slp is SLPRequestMessage &&
(slp as SLPRequestMessage).Method == "INVITE" &&
slp.ContentType == "application/x-msnmsgr-sessionreqbody")
{
uint appId = slp.BodyValues.ContainsKey("AppID") ? uint.Parse(slp.BodyValues["AppID"].Value) : 0;
Guid eufGuid = slp.BodyValues.ContainsKey("EUF-GUID") ? new Guid(slp.BodyValues["EUF-GUID"].Value) : Guid.Empty;
P2PVersion ver = slp.P2PVersion;
if (P2PApplication.IsRegistered(eufGuid, appId))
{
P2PSession newSession = FindSessionByCallId(slp.CallId, ver);
if (newSession == null)
{
newSession = new P2PSession(slp as SLPRequestMessage, p2pMessage, nsMessageHandler, bridge);
newSession.Closed += P2PSessionClosed;
if (newSession.Version == P2PVersion.P2PV2)
{
p2pV2Sessions.Add(newSession);
}
else
{
p2pV1Sessions.Add(newSession);
}
}
else
{
// P2PSession exists, bridge changed...
if (newSession.Bridge != bridge)
{
// BRIDGETODO
}
}
return(true);
}
// Not registered application. Decline it without create a new session...
slpHandler.SendSLPStatus(bridge, p2pMessage, source, sourceGuid, 603, "Decline");
return(true);
}
// 4) FIND SESSION: Search session by SessionId/ExpectedIdentifier
P2PSession session = FindSession(p2pMessage, slp);
if (session != null)
{
// ResetTimeoutTimer();
// Keep track of theremoteIdentifier
// Keep track of the remote identifier
session.remoteIdentifier = (p2pMessage.Version == P2PVersion.P2PV2) ?
p2pMessage.Header.Identifier + p2pMessage.Header.MessageSize :
p2pMessage.Header.Identifier;
// Session SLP
if (slp != null && slpHandler.HandleP2PSessionSignal(bridge, p2pMessage, slp, session))
{
return(true);
}
// Session Data
if (slp == null && session.ProcessP2PData(bridge, p2pMessage))
{
return(true);
}
}
return(false);
}
public P2PDataMessage(P2PMessage copy)
: base(copy)
{
}
internal bool HandleP2PSessionSignal(P2PBridge bridge, P2PMessage p2pMessage, SLPMessage slp, P2PSession session)
{
if (slp is SLPRequestMessage)
{
SLPRequestMessage slpRequest = slp as SLPRequestMessage;
if (slpRequest.ContentType == "application/x-msnmsgr-sessionclosebody" &&
slpRequest.Method == "BYE")
{
if (p2pMessage.Version == P2PVersion.P2PV1)
{
P2PMessage byeAck = p2pMessage.CreateAcknowledgement();
byeAck.V1Header.Flags = P2PFlag.CloseSession;
session.Send(byeAck);
}
else if (p2pMessage.Version == P2PVersion.P2PV2)
{
SLPRequestMessage slpMessage = new SLPRequestMessage(session.RemoteContactEPIDString, "BYE");
slpMessage.Target = session.RemoteContactEPIDString;
slpMessage.Source = session.LocalContactEPIDString;
slpMessage.Branch = session.Invitation.Branch;
slpMessage.CallId = session.Invitation.CallId;
slpMessage.ContentType = "application/x-msnmsgr-sessionclosebody";
slpMessage.BodyValues["SessionID"] = session.SessionId.ToString(System.Globalization.CultureInfo.InvariantCulture);
session.Send(session.WrapSLPMessage(slpMessage));
}
session.OnClosed(new ContactEventArgs(session.Remote));
return true;
}
else
{
if (slpRequest.ContentType == "application/x-msnmsgr-transreqbody" ||
slpRequest.ContentType == "application/x-msnmsgr-transrespbody" ||
slpRequest.ContentType == "application/x-msnmsgr-transdestaddrupdate")
{
P2PSession.ProcessDirectInvite(slpRequest, nsMessageHandler, session); // Direct connection invite
return true;
}
}
}
else if (slp is SLPStatusMessage)
{
SLPStatusMessage slpStatus = slp as SLPStatusMessage;
if (slpStatus.Code == 200) // OK
{
if (slpStatus.ContentType == "application/x-msnmsgr-transrespbody")
{
P2PSession.ProcessDirectInvite(slpStatus, nsMessageHandler, session);
return true;
}
else
{
if (session.Application != null)
{
session.OnActive(EventArgs.Empty);
session.Application.Start();
return true;
}
}
}
else if (slpStatus.Code == 603) // Decline
{
session.OnClosed(new ContactEventArgs(session.Remote));
return true;
}
else if (slpStatus.Code == 500) // Internal Error
{
return true;
}
}
Trace.WriteLineIf(Settings.TraceSwitch.TraceWarning,
String.Format("Unhandled SLP Message in session:---->>\r\n{0}", p2pMessage.ToString()), GetType().Name);
session.OnError(EventArgs.Empty);
return true;
}
/// <summary>
/// Split big P2PMessages to transport over sb or dc.
/// </summary>
/// <param name="maxSize"></param>
/// <returns></returns>
public P2PMessage[] SplitMessage(int maxSize)
{
uint payloadMessageSize = 0;
if (Version == P2PVersion.P2PV1)
{
payloadMessageSize = V1Header.MessageSize;
}
if (Version == P2PVersion.P2PV2)
{
payloadMessageSize = (uint)V2Header.MessageSize - (uint)V2Header.DataPacketHeaderLength;
}
if (payloadMessageSize <= maxSize)
return new P2PMessage[] { this };
List<P2PMessage> chunks = new List<P2PMessage>();
byte[] totalMessage = (InnerBody != null)
? InnerBody
: InnerMessage.GetBytes();
long offset = 0;
if (Version == P2PVersion.P2PV1)
{
while (offset < totalMessage.LongLength)
{
P2PMessage chunkMessage = new P2PMessage(Version);
uint messageSize = (uint)Math.Min((uint)maxSize, (totalMessage.LongLength - offset));
byte[] chunk = new byte[messageSize];
Buffer.BlockCopy(totalMessage, (int)offset, chunk, 0, (int)messageSize);
chunkMessage.V1Header.Flags = V1Header.Flags;
chunkMessage.V1Header.AckIdentifier = V1Header.AckIdentifier;
chunkMessage.V1Header.AckTotalSize = V1Header.AckTotalSize;
chunkMessage.V1Header.Identifier = V1Header.Identifier;
chunkMessage.V1Header.SessionId = V1Header.SessionId;
chunkMessage.V1Header.TotalSize = V1Header.TotalSize;
chunkMessage.V1Header.Offset = (ulong)offset;
chunkMessage.V1Header.MessageSize = messageSize;
chunkMessage.InnerBody = chunk;
chunkMessage.V1Header.AckSessionId = V1Header.AckSessionId;
chunkMessage.Footer = Footer;
chunkMessage.PrepareMessage();
chunks.Add(chunkMessage);
offset += messageSize;
}
}
if (Version == P2PVersion.P2PV2)
{
uint nextId = Header.Identifier;
long dataRemain = (long)V2Header.DataRemaining;
while (offset < totalMessage.LongLength)
{
P2PMessage chunkMessage = new P2PMessage(Version);
int maxDataSize = maxSize;
if (offset == 0 && V2Header.HeaderTLVs.Count > 0)
{
foreach (KeyValuePair<byte, byte[]> keyvalue in V2Header.HeaderTLVs)
{
chunkMessage.V2Header.HeaderTLVs[keyvalue.Key] = keyvalue.Value;
}
maxDataSize = maxSize - chunkMessage.V2Header.HeaderLength;
}
uint dataSize = (uint)Math.Min((uint)maxDataSize, (totalMessage.LongLength - offset));
byte[] chunk = new byte[dataSize];
Buffer.BlockCopy(totalMessage, (int)offset, chunk, 0, (int)dataSize);
if (offset == 0)
{
chunkMessage.V2Header.OperationCode = V2Header.OperationCode;
}
chunkMessage.V2Header.SessionId = V2Header.SessionId;
chunkMessage.V2Header.TFCombination = V2Header.TFCombination;
chunkMessage.V2Header.PackageNumber = V2Header.PackageNumber;
if (totalMessage.LongLength + dataRemain - (dataSize + offset) > 0)
{
chunkMessage.V2Header.DataRemaining = (ulong)(totalMessage.LongLength + dataRemain - (dataSize + offset));
}
if ((offset != 0) &&
TFCombination.First == (V2Header.TFCombination & TFCombination.First))
{
chunkMessage.V2Header.TFCombination = (TFCombination)(V2Header.TFCombination - TFCombination.First);
}
chunkMessage.InnerBody = chunk;
chunkMessage.Header.Identifier = nextId;
nextId += chunkMessage.Header.MessageSize;
chunks.Add(chunkMessage);
offset += dataSize;
}
}
return chunks.ToArray();
}
