Created attachment 17729 [details]
Debug output from libsmbclient

I wrote something like this:

SMBCCTX *smbcctx = smbc_new_context();
SmbcAuth smbc_auth;smbc_auth.address = "fs.rookad.local";  
smbc_auth.user = "rookad/administrator";            
smbc_auth.password = mypassword;  
smbc_auth.workgroup = "";    
smbc_setOptionUserData(smbcctx, &smbc_auth);
smbc_setFunctionAuthDataWithContext(smbcctx, smbc_auth_fn_ctx);
smbc_init_context(smbcctx);

SMBCFILE *smbfile = NULL;
string smbpath = "smb://" + smbc_auth.address + "/home/sam";
if (NULL == (smbfile = smbc_getFunctionOpendir(smbcctx)(smbcctx,
                                                        smbpath.c_str()))) {
    perror("smbc_getFunctionOpendir");
    return 1;
}

But got the output:

session setup failed: NT_STATUS_LOGON_FAILURE
Could not resolve \sam\*
smbc_getFunctionOpendir: No such file or directory

In the wireshark file attached, from the packet, I can see the username passed in is a bit strange: User = WORKGROUP\rookad/administrator, it should be User = ROOKAD\administrator.

If I change the code above to the following, it works normally:
smbc_auth.user = "administrator";
smbc_auth.workgroup = "rookad";

And the wireshark file is attached.