I don't think so. SIOCATMARK is an WSAIoctl/ioctlsocket option in the winsock api, too. We don't seem to handle that in WSAIoctl, it seems, patch coming up.
Fair enough, I didn't investigate it further than with grep.
As I wrote in my other email, I obviously need to update the PSDK I have installed in Wine to get the header file. I'll look into that a bit later. I assume that TCP_ATMARK could be similar to SO_OOBINLINE, but that's a wild guess. I will need to write some test setup for this.
I also don't have this header file or definition on my (latest, I believe) PSDK. --Juan