[ds6-devel] ca refactor

[Chris Leishman]

Hi,

Once again I've done a little bit of refactoring, which I'm making 
available for comment.

Basically, the commit I did earlier for cleaning up main and the 
connection_attributes got me a little frustrated because I wasn't sure 
if the ca was trying to just be an attribute store, or if it was trying 
to be something more (because, for example, the io_streams were stored 
in there).  So, to clarify I've refactored a bit to do the following:

- Reduced connection_attributes to purely an attribute store.  It just 
stores the values to use for configuring everything (the buffer size, 
etc) rather than configuring things directly.

- Reorganised main such that the buffers and io_streams and initialized 
there, using values pulled from the ca for buffer size, mtu, nru, etc.

- Changed do_connect / do_listen so that instead of modifing the 
remote_stream inside the ca, they just return the fd & socktype.  main 
(or actually a static establish_connection function) then sticks these 
into the remote io_stream.

- Broke main up a bit more (main, connection_main, establish_connection 
& run_transfer).


So anyway, as I'm not keen to just plaster everything with this until I 
have some discussion (or just Mauro's approval anyway), I've put it 
into one of my surely now infamous refactor branches.  This ones 
'chris_refactor_060103'.

Regards,
Chris