TCP on HP-UX?
In HP-UX 10.00-10.20, a special module exists which provides XTI access over the BSD stack – TLI is not supported. TLI, for the most part after SVID 3 volume 5, has stopped evolving and is being replaced by XTI in most implementations. XTI is standardized by X/Open and the current versions from most vendors should be XPG4 compliant with some being branded as the branding test suites are made available by X/Open. Note the reason one needs a streams-based TCP is that both TLI and XTI rely upon a streams-based module, timod, to provide specific functionality within the kernel and this module needs to be pushed upon the transport stack. Since HP-UX uses a BSD transport which is not streams-based and is therefore incapable of having a streams-based module pushed upon it, one can not run TLI/XTI directly upon it, and, hence, a special streams module was created to provide this functionality for HP-UX 10.0. As of HP-UX 10.
