On 6/18/13 5:46 PM, Nick Kew wrote:
On 18 Jun 2013, at 22:18, Jon Leighton wrote:
I've been looking into the possibility of writing a module to support using SCTP as an
alternative to TCP. After spending some time reading "The Apache Modules Book"
and looking through the code, I have the impression that the module architecture doesn't
support controlling the types of sockets that are opened. I'm hoping someone can either
confirm or correct my impression. Thanks very much.
It's not covered by the book, and I'd need to tackle pretty much
the same learning curve as you to hack it.
Your startingpoint would probably be APR's network_io module.
If you're thinking HTTP-over-SCTP (if indeed that makes any sense)
then that may be most of what you need to do. If not, or if you want
to do everything as a module, you could start by looking at protocol
modules like mod_ftp or mod_smtp.
I don't think simply swapping SCTP for TCP has anything to offer HTTP -
that's just a starting point for me. I'm more interested in putting
SCTP's streams to good use, such as possibly tying it into mod-spdy.
I've hacked older versions of httpd to support HTTP over SCTP streams,
but I was hoping to do something much cleaner, like a module. My main
concern is that I don't see a way for a module to touch ap_listeners in
listen.c, nor a way to create my own list of listeners that I could
somehow pass off to httpd. I'll check out mod_ftp and mod_smtp as you
suggested. Thanks very much.
