pesto, conf, fwd_rule: Add options and modes to add, delete, clear rules

Instead of just being able to add to the existing tables, implement
an explicit --clear option to replace them, which now becomes the
default behaviour, and implement explicit --add and --delete options
to maintain the table and add or delete specific ports.

The option --clear PIF forces the clearing of a table, instead.

These options can be combined arbitrarily and are handled as
sequential commands, as now described in pesto(1).

If no option is given before forwarding specifiers for a matching
table, the command line is interpreted as a replacement of the
existing rules.

To this end:

- there's no protocol change, as pesto is anyway sending updated
  copies of the table

- the forwarding table functions now include a new fwd_rule_del(),
  which deletes existing rule only if a matching one is found

- a trivial fwd_rule_clear() is factored out from the existing
  conf_handler() implementation, so that it can be directly used
  in pesto

The entry points for parsing of port specifiers now take an additional
'del' parameter which is passed down all the way before reaching the
fwd_rule_add() implementation. If a rule should be deleted, at that
point, fwd_rule_del() is called instead.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

0 files changed, 0 insertions, 0 deletions