Writing C# emu from scratch (3.3.5), stuck on character list. Can someone help? menu

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  1. #1
    GobVs's Avatar Member
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    Writing C# emu from scratch (3.3.5), stuck on character list. Can someone help?

    Hello!
    I'm implementing 3.3.5a emulator from zero for learning purposes, but stuck on a place without progress. What I have now:
    -auth challenge/proof works, server-side and client proof match correcrly
    -sending realmlist works
    -worldserver sends SMSG_AUTH_CHALLENGE and receives CMSG_AUTH_SESSION, calculated proof matches client proof (so I assume this step works correctly)
    -worldserver sends SMSG_AUTH_RESPONSE encrypted header and client starts retrieving characters, i'm getting CMSG_READY_FOR_ACCOUNT_DATA_TIMES, CMSG_REALM_SPLIT, CMSG_CHAR_ENUM.
    -if I stay online, client keeps CMSG_PING periodically

    After replying to all three packets I'm getting an "error while loading character list". I also tried to implement CMSG_CHAR_CREATE/SMSG_CHAR_CREATE, sending 1 byte 0x2E, but client is now stuck at "Creating character" and that's it. If I cancel creating character, the client again throws all three packets (ready for times, split, enum), and stuck on loading. At this point I assume something is wrong with packet sending or one of packet structures is wrong, while receiving works correctly (Sending 1 byte char enum with zero inside leads to no error tho, while creating char after is still stuck)
    Here's my connection.log
    Code:
    7/17 02:39:51.044  GRUNT: state: LOGIN_STATE_CONNECTING result: LOGIN_OK 
    7/17 02:39:51.044  GRUNT: state: RESPONSE_CONNECTED result: LOGIN_OK 127.0.0.1:3724
    7/17 02:39:51.145  GRUNT: state: LOGIN_STATE_AUTHENTICATING result: LOGIN_OK 
    7/17 02:39:51.220  GRUNT: state: LOGIN_STATE_CHECKINGVERSIONS result: LOGIN_OK 
    7/17 02:39:51.259  GRUNT: state: LOGIN_STATE_HANDSHAKING result: LOGIN_OK 
    7/17 02:39:51.259  GRUNT: state: LOGIN_STATE_AUTHENTICATED result: LOGIN_OK 
    7/17 02:39:51.259  ClientConnection Initiating: COP_CONNECT code=CSTATUS_CONNECTING 
    7/17 02:39:51.301  ClientConnection Completed: COP_CONNECT code=RESPONSE_CONNECTED result=TRUE
    7/17 02:39:51.301  ClientConnection Initiating: COP_AUTHENTICATE code=CSTATUS_AUTHENTICATING 
    7/17 02:39:51.376  ClientConnection Completed: COP_AUTHENTICATE code=AUTH_OK result=TRUE
    7/17 02:39:51.876  ClientConnection Initiating: COP_GET_CHARACTERS code=43 
    7/17 02:39:51.891  ClientConnection Completed: COP_GET_CHARACTERS code=45 result=FALSE   <--- error loading characters
    7/17 02:39:57.076  ClientConnection Initiating: COP_CREATE_CHARACTER code=46 
    7/17 02:45:07.510  ClientConnection Completed: COP_CREATE_CHARACTER code=RESPONSE_CANCELLED result=FALSE    <---- stuck at creating character, manually cancelled
    7/17 02:45:08.486  ClientConnection Initiating: COP_GET_CHARACTERS code=43 
    7/17 02:45:12.876  ClientConnection Completed: COP_GET_CHARACTERS code=RESPONSE_CANCELLED result=FALSE   <---- stuck at loading characters, manually cancelled
    7/17 02:45:12.879  ClientConnection Initiating: COP_GET_REALMS code=REALM_LIST_IN_PROGRESS  <--- client DCed himself and returned to realmlist
    7/17 02:45:12.879  ClientConnection Completed: COP_GET_REALMS code=REALM_LIST_SUCCESS result=TRUE
    7/17 02:45:14.068  ClientConnection Initiating: COP_CONNECT code=CSTATUS_CONNECTING 
    7/17 02:45:14.068  ClientConnection Completed: COP_CONNECT code=RESPONSE_CONNECTED result=TRUE
    7/17 02:45:14.068  ClientConnection Initiating: COP_AUTHENTICATE code=CSTATUS_AUTHENTICATING 
    7/17 02:45:14.084  ClientConnection Completed: COP_AUTHENTICATE code=AUTH_OK result=TRUE
    7/17 02:45:14.084  ClientConnection Initiating: COP_GET_CHARACTERS code=43 
    7/17 02:45:14.084  ClientConnection Completed: COP_GET_CHARACTERS code=45 result=FALSE
    7/17 02:45:43.810  GRUNT: state: LOGIN_STATE_DISCONNECTED result: LOGIN_OK
    I also can't understand what is account data times, so probably here's some error. Here's what I'm responding with
    Code:
            var sheader = new ServerPacketHeader(4 + 1 + 4 + 8 * 4, Opcode.SMSG_ACCOUNT_DATA_TIMES);
            _encryptor.Encrypt(ref sheader);
            _smsg.Write(sheader);
            var time = (uint)DateTimeOffset.Now.ToUnixTimeSeconds();
            _smsg.Write(time);
            _smsg.Write(1);
            _smsg.Write((uint)0x15);
            for (int i = 0; i < 8; i++)
            {
                _smsg.Write((uint)0);
            }
            _stream.PushPacket(_smsg);
    Also char enum code:
    Code:
            _smsg.Position = 4; //leave space for header
            _smsg.Write(1); //char count
            _smsg.Write((ulong)1); // character guid
            _smsg.Write("Test"); //extension method, null-terminated
            _smsg.Write(1); // race
            _smsg.Write(1); //class
            _smsg.Write(1); //gender
            _smsg.Write(8); //skin
            _smsg.Write(2); //face
            _smsg.Write(8); //hairstyle
            _smsg.Write(5); //haircolor
            _smsg.Write(6); //facialstyle
            _smsg.Write(80); //level
            _smsg.Write((uint)12); //zone
            _smsg.Write((uint)0); //map
            _smsg.Write(-8949.95F); //x  coords and zone/map is some race' starting location
            _smsg.Write(-132.493F); //y
            _smsg.Write(83.5312F); //z
            _smsg.Write((uint)0); //guild id
            _smsg.Write((uint)0); // char flags
            _smsg.Write((uint)0); // at login flags
            _smsg.Write(0); //first login
            _smsg.Write((uint)0); //pet display id
            _smsg.Write((uint)0); //pet level
            _smsg.Write((uint)0); //pet family
            for (int i = 0; i < 23; i++) //gear info
            {
                _smsg.Write((uint)0);
                _smsg.Write(0);
                _smsg.Write((uint)0);
            }
            var pos = _smsg.Position;
            var header = new ServerPacketHeader((ushort)_smsg.Position, Opcode.SMSG_CHAR_ENUM);
            _encryptor.Encrypt(ref header);
            _smsg.Position = 0; //write header at start
            _smsg.Write(header);
            _smsg.Position = pos; //restore position for writer method
            _stream.PushPacket(_smsg);
    Can someone help figuring out where I'm failing?

    Edit: I was sending wrong character create result, now I'm sending 47 and after creating it successfully returns me back to the character list. List loading still not working tho.
    Last edited by GobVs; 07-17-2022 at 01:20 AM. Reason: Fixed char_create bug

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  2. Thanks eSko (1 members gave Thanks to GobVs for this useful post)
  3. #2
    GobVs's Avatar Member
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    Ok the problem is figured out and I feel a bit dumb now. I was setting Position to 4 for header offset, and then calculating packet size from stream position, which was 4 bytes more than intended.

  4. Thanks stoneharry (1 members gave Thanks to GobVs for this useful post)
  5. #3
    Vragoth's Avatar Established Member
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    is it open source at the moment? I'm curious to see a modern C# emulator.

  6. #4
    GobVs's Avatar Member
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    Originally Posted by Vragoth View Post
    is it open source at the moment? I'm curious to see a modern C# emulator.
    My goal is to implement a very basic blizz-style auth-char-worldnodes model on a fresh codebase (i.e. enter charserver, select char, redirect to worldnode during load and successfully proof connection is the goal). If I can achieve this, I have plans on making repo open-source, but right now I think there's nothing to show, as a decent part of code is "throw as is, to see how it works"

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