EDIABAS Interface Drivers

Analysis of decompiled EDIABAS interface handler (IFH) DLLs from Ghidra.

Overview

EDIABAS uses pluggable interface drivers (IFH DLLs) for communication with diagnostic hardware. Each driver implements the standard IFH API.

Available Drivers

Driver	Purpose	Protocol	Size
XEnet32	BMW Ethernet diagnostics	HSFZ/ENET	~36K lines
XStd32	Standard serial wrapper	Loads sub-DLLs	~22K lines
OBD32	OBD-II serial interface	K-Line, KWP2000, DS2, KBUS	~11K lines
XNul32	Null/dummy interface	None (simulation)	~5.7K lines

IFH API

All interface drivers export the same API:

Export	Description
dllStartupIFH	Initialize interface
dllShutdownIFH	Shutdown interface
dllCheckIFH	Check capability
dllCallIFH	Execute command

Command Codes

Code	Hex	Name	Description
2	0x02	IFH_INIT	Initialize
3	0x03	IFH_END	Terminate
4	0x04	IFH_CONNECT	Connect to vehicle
5	0x05	IFH_DISCONNECT	Disconnect
6	0x06	IFH_SYSINFO	Get system info
22	0x16	IFH_SEND_TELEGRAM	Send diagnostic telegram
23	0x17	IFH_RECEIVE	Receive response
30	0x1E	IFH_GETERROR	Get last error
34	0x22	IFH_SETPARAMETER	Set parameters
35	0x23	IFH_GETPARAMETER	Get parameters
40	0x28	IFH_OPEN_CHANNEL	Open channel
41	0x29	IFH_CLOSE_CHANNEL	Close channel

Architecture

┌─────────────────────────────────────────────────────────┐
│                    ebas32.dll                           │
│                  (EDIABAS Runtime)                      │
└────────────────────────┬────────────────────────────────┘
                         │
                         │ IFH API
                         ▼
┌─────────────┬─────────────────┬─────────────────────────┐
│  XEnet32    │     XStd32      │       XNul32            │
│  (Ethernet) │    (Serial)     │     (Simulator)         │
└─────────────┴─────────────────┴─────────────────────────┘
      │               │                    │
      ▼               ▼                    ▼
┌───────────┐  ┌─────────────┐      ┌───────────┐
│ TCP/IP    │  │ COM Port    │      │   None    │
│ Winsock   │  │ Serial API  │      │           │
└───────────┘  └─────────────┘      └───────────┘

Common Error Codes

Code	Hex	Description
0	0x00	Success
7	0x07	Not connected
19	0x13	Not initialized
27	0x1B	Fatal error
28	0x1C	Invalid parameter
29	0x1D	Not supported
57	0x39	Invalid channel
72	0x48	Busy
73	0x49	Channel conflict