/// <summary>
/// "GETPROFILE" packet. Submitted by the client to get the content of a profile (i.e. associated with a friend code) by profileid.
/// </summary>
private void OnReceive_GetProfile(NetState ns, GsTcpReader reader)
{
int sessionKey = int.Parse(reader.GetParameter("sesskey"));
int seqNum = int.Parse(reader.GetParameter("id")); // sequence ID of this record.
if (ns.GsSessionID != sessionKey)
{
Send(ns, GsSmsgError.ErrFatalSessionKeyInvalid(seqNum));
throw new NetStateMsgException(ns, "sent incorrect sesskey parameter.", reader);
}
int profileID = int.Parse(reader.GetParameter("profileid"));
AccountRequestProfile info = new AccountRequestProfile(profileID);
EventSink.InvokeAccountProfile(info);
if (info.IsHandled && info.IsSuccess)
{
Kernel.WriteLine(TypeName, $"{ns} requested profile for '{info.Account}'.");
Send(ns, new GsSmsgProfileInfo(info.Account, seqNum));
}
else if (info.IsHandled)
{
Send(ns, GsSmsgError.ErrProfileRequestInvalid(seqNum));
}
else
{
Send(ns, GsSmsgError.ErrFatalDatabaseError(seqNum));
throw new NetStateMsgException(ns, "sent GetProfile; EventSink did not handle the message.", reader);
}
}
private void OnReceive_Logout(NetState ns, GsTcpReader reader)
{
int sessionKey = int.Parse(reader.GetParameter("sesskey")); // no need to validate this, just log out.
Kernel.WriteLine(TypeName, $"{ns} sent logout.");
ns.Dispose();
}
/// <summary>
/// STATUS packet. The purpose of STATUS records is unknown. It is hypothesized that status values are:
/// 1 = transient state, such as "logging in" or "ending trade";
/// 2 = game has joined another game;
/// 5 = game is attempting to join another game;
/// 6 = standby announcement state;
/// </summary>
private void OnReceive_Status(NetState ns, GsTcpReader reader)
{
ns.GsStatus = int.Parse(reader.RecordValue);
Kernel.WriteLine(TypeName, $"{ns} GsStatus=='{ns.GsStatus}'.");
if (reader.HasParameter("statstring", out string statusString))
{
ns.GsStatusString = statusString;
}
if (reader.HasParameter("locstring", out string locationString))
{
ns.GsStatusLocation = locationString;
}
}
/// <summary>
/// "updatepro" packet. Appended to a GETPROFILE record (after its \final\ record terminator) to modify a
/// profile. Note that, as it is does not have a corresponding response record (or perhaps because it is
/// appended to a GETPROFILE record), there is no id key in this record.
/// </summary>
private void OnReceive_UpdateProfile(NetState ns, GsTcpReader reader)
{
int sessionKey = int.Parse(reader.GetParameter("sesskey"));
if (ns.GsSessionID != sessionKey)
{
Send(ns, GsSmsgError.ErrFatalSessionKeyInvalid(0));
throw new NetStateMsgException(ns, "sent incorrect sesskey parameter.", reader);
}
if (reader.HasParameter("firstname", out string firstName))
{
ns.Account.FirstName = firstName;
}
if (reader.HasParameter("lastname", out string lastName))
{
ns.Account.LastName = lastName;
}
Kernel.WriteLine(TypeName, $"{ns} updated profile.");
}
/// <summary>
/// "login" packet. This is the response to the server's login challenge.
/// </summary>
private void OnReceive_Login(NetState ns, GsTcpReader reader)
{
string clientChallenge = reader.GetParameter("challenge"); // 32 chars ASCII upper/lower. Verifies server.
string sessionToken = reader.GetParameter("authtoken"); // identifies account DS wishes to log in with.
string response = reader.GetParameter("response"); // 128bit (as 32char hex) response LOGIN_CHALLENGE.
string firewall = reader.GetParameter("firewall"); // whether the client is behind a firewall.
string port = reader.GetParameter("port"); // port open on the device for communications.
string product = reader.GetParameter("productid"); // GameSpy-specific ID indicating the product attempting to connect to GameSpy.
string gamename = reader.GetParameter("gamename"); // GameSpy-specific name of the game
// string nmspace = reader.GetParameter("nmspace"); // indicates presence of additional login parameters in this packet
int seqNum = int.Parse(reader.GetParameter("id")); // sequence ID of the previous LOGIN_CHALLENGE.
// get account
AccountRequestLogin info = new AccountRequestLogin(sessionToken);
EventSink.InvokeAccountLogin(info);
if (info.IsHandled && info.IsSuccess)
{
// verify client authentication:
string verify = GsMd5Sum.HashChallenge(info.Account.GsLoginPassword, info.Account.GsLoginToken, clientChallenge, ns.GsServerChallenge);
if (verify != response)
{
throw new NetStateMsgException(ns, "sent incorrect LOGIN verification.", reader);
}
// client authenticated! Create server authentication proof and then login client:
string proof = GsMd5Sum.HashChallenge(info.Account.GsLoginPassword, info.Account.GsLoginToken, ns.GsServerChallenge, clientChallenge);
ns.Account = info.Account;
ns.GenerateGamespySessionData();
ns.Account.GenerateGamespyLoginData(info);
Kernel.WriteLine(TypeName, $"{ns} logged in as '{ns.Account}'.");
Send(ns, new GsSmsgLoggedIn(proof, ns, seqNum));
}
else if (info.IsHandled)
{
Send(ns, GsSmsgError.ErrFatalLoginFailed(seqNum));
throw new NetStateMsgException(ns, $"sent wrong credentials: {info.FailReason}", reader);
}
else
{
Send(ns, GsSmsgError.ErrFatalDatabaseError(seqNum));
throw new NetStateMsgException(ns, "sent Login; EventSink did not handle the message.", reader);
}
}
private void ReceiveWfc29900(NetState ns, byte[] buffer, int length)
{
try {
int offset = 0;
while (offset < length && !ns.IsDisposing)
{
GsTcpReader reader = new GsTcpReader(buffer, offset, length);
switch (reader.RecordType)
{
case "login":
OnReceive_Login(ns, reader);
break;
case "logout":
OnReceive_Logout(ns, reader);
break;
case "getprofile":
OnReceive_GetProfile(ns, reader);
break;
case "updatepro":
OnReceive_UpdateProfile(ns, reader);
break;
case "status":
OnReceive_Status(ns, reader);
break;
default:
Kernel.WriteLine(TypeName, $"{ns} sent unhandled Wfc29900 message.");
Console.WriteLine(BufferFormat.AsString(buffer, length));
break;
}
offset = reader.Position;
}
}
catch (Exception e) {
Console.Write($"{TypeName}: {e.Message}");
ns.DisposeAfterNextFlush();
}
}
