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;
}
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);
}
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);
}
private static void ProcessDirectAddrUpdate(
SLPMessage message,
NSMessageHandler nsMessageHandler,
P2PSession startupSession)
{
Contact from = nsMessageHandler.ContactList.GetContactWithCreate(message.FromEmailAccount, IMAddressInfoType.WindowsLive);
IPEndPoint[] ipEndPoints = SelectIPEndPoint(message.BodyValues, nsMessageHandler);
if (from.DirectBridge != null && ipEndPoints != null && ipEndPoints.Length > 0)
{
((TCPv1Bridge)from.DirectBridge).OnDestinationAddressUpdated(new DestinationAddressUpdatedEventArgs(ipEndPoints));
}
}
internal static void ProcessDirectInvite(SLPMessage slp, NSMessageHandler ns, P2PSession startupSession)
{
switch (slp.ContentType)
{
case "application/x-msnmsgr-transreqbody":
ProcessDCReqInvite(slp, ns, startupSession);
break;
case "application/x-msnmsgr-transrespbody":
ProcessDCRespInvite(slp, ns, startupSession);
break;
case "application/x-msnmsgr-transdestaddrupdate":
ProcessDirectAddrUpdate(slp, ns, startupSession);
break;
}
}
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);
}
public override void SetupInviteMessage(SLPMessage slp)
{
slp.BodyValues["RequestFlags"] = "18";
base.SetupInviteMessage(slp);
}
/// <summary>
/// Checks if the invitation was valid.
/// </summary>
/// <param name="invitation"></param>
/// <returns></returns>
public virtual bool ValidateInvitation(SLPMessage invitation)
{
bool ret = invitation.ToEmailAccount.ToLowerInvariant() == local.Account.ToLowerInvariant();
if (ret && version == P2PVersion.P2PV2 && invitation.ToEndPoint != Guid.Empty)
{
ret = invitation.ToEndPoint == localEP;
}
return ret;
}
/// <summary>
/// Prepares the invite message.
/// </summary>
/// <param name="slp"></param>
public virtual void SetupInviteMessage(SLPMessage slp)
{
slp.BodyValues["EUF-GUID"] = ApplicationEufGuid.ToString("B").ToUpperInvariant();
slp.BodyValues["AppID"] = ApplicationId.ToString(System.Globalization.CultureInfo.InvariantCulture);
slp.BodyValues["Context"] = InvitationContext;
}
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);
}
internal static void ProcessDirectInvite(SLPMessage slp, NSMessageHandler ns, P2PSession startupSession)
{
switch (slp.ContentType)
{
case "application/x-msnmsgr-transreqbody":
ProcessDCReqInvite(slp, ns, startupSession);
break;
case "application/x-msnmsgr-transrespbody":
ProcessDCRespInvite(slp, ns, startupSession);
break;
case "application/x-msnmsgr-transdestaddrupdate":
ProcessDirectAddrUpdate(slp, ns, startupSession);
break;
}
}
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();
}
public override bool ValidateInvitation(SLPMessage invite)
{
bool ret = base.ValidateInvitation(invite);
try
{
FTContext context = new FTContext(Convert.FromBase64String(invite.BodyValues["Context"].Value));
Trace.WriteLineIf(Settings.TraceSwitch.TraceVerbose,
String.Format("{0} ({1} bytes) (base validate {2})", context.Filename, context.FileSize, ret), GetType().Name);
return ret && (!string.IsNullOrEmpty(context.Filename)) && (context.FileSize > 0);
}
catch (Exception)
{
// We can't parse the context, so refuse the invite
Trace.WriteLineIf(Settings.TraceSwitch.TraceError,
String.Format("Unable to parse file transfer invite: {0}", invite.ToDebugString()), GetType().Name);
return false;
}
}
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 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);
}
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 override bool ValidateInvitation(SLPMessage invite)
{
bool ret = base.ValidateInvitation(invite);
if (ret)
{
MSNObject validObject = new MSNObject();
validObject.SetContext(invite.BodyValues["Context"].Value, true);
if (validObject.ObjectType == MSNObjectType.UserDisplay ||
validObject.ObjectType == MSNObjectType.Unknown)
{
msnObject = Local.DisplayImage;
objStream = Local.DisplayImage.OpenStream();
ret |= true;
}
else if (validObject.ObjectType == MSNObjectType.Scene)
{
msnObject = Local.SceneImage;
objStream = Local.SceneImage.OpenStream();
ret |= true;
}
else if (validObject.ObjectType == MSNObjectType.Emoticon &&
Local.Emoticons.ContainsKey(validObject.Sha))
{
msnObject = Local.Emoticons[msnObject.Sha];
objStream = ((Emoticon)msnObject).OpenStream();
ret |= true;
}
}
return ret;
}
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();
}
}
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());
}
}
private static void ProcessDirectAddrUpdate(
SLPMessage message,
NSMessageHandler nsMessageHandler,
P2PSession startupSession)
{
Contact from = nsMessageHandler.ContactList.GetContactWithCreate(message.FromEmailAccount, IMAddressInfoType.WindowsLive);
IPEndPoint[] ipEndPoints = SelectIPEndPoint(message.BodyValues, nsMessageHandler);
if (from.DirectBridge != null && ipEndPoints != null && ipEndPoints.Length > 0)
{
((TCPv1Bridge)from.DirectBridge).OnDestinationAddressUpdated(new DestinationAddressUpdatedEventArgs(ipEndPoints));
}
}
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 override bool ValidateInvitation(SLPMessage invitation)
{
bool ret = base.ValidateInvitation(invitation);
if (ret)
{
try
{
byte[] byts = Convert.FromBase64String(invitation.BodyValues["Context"].Value);
string activityUrl = System.Text.Encoding.Unicode.GetString(byts);
string[] activityProperties = activityUrl.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
if (activityProperties.Length >= 3)
{
return true;
}
}
catch (Exception ex)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceError,
"An error occured while parsing activity context, error info: " +
ex.Message, GetType().Name);
}
}
return ret;
}
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;
}
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;
}
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();
}
}
