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();
}
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();
}
}
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();
}
}
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();
}
}
}
