Re: RFC: PPP over X

[Dave Grothe <dave@xxxxxxxx>]

To amplify a bit on what Ole said:  The Linux STREAMS code (LiS) does a good job
in being able to interpose complex and flexible protocol stacks below IP -- the
_standard_ Linux IP.

What it _cannot_ do, and would require some assistance from the kernel
networking folks, is to run protocol stacks _above_ TCP or _above_ UDP.  Every
once in awhile I get a question from a potential customer about tunneling our
SNA over a TCP connection in Linux.  Without making a trip up to user space the
answer always has to be "can't be done."  The reason being that we can't
configure our SNA code (STREAMS based) above TCP while keeping the messages in
the kernel.

(Having contributed this two-cents worth to this discussion, I feel somewhat
embarassed in that I am leaving for a two-week vacation on Saturday and will not
have an opportunity to read responses or comment further.)

-- Dave (author of LiS)