Hi Iwamoto-San,
Basically, this feature is very similar to "ryu.lib.ofctl_v1_*", I guess.
In case of ofctl_v1_*, this library provides the translation layer (json like
object -> OFP* instance) and seems to be well separated from "ryu.ofproto"
module ("ofctl_v1_*" have many duplicated codes though...).
For example, OFPInstructionGotoTable.from_string() is not for the pure OpenFlow
protocol and is specifically for the "ovs-ofctl" command of OVS.
So I think it might be better to implement this feature under "ryu.lib" module
(e.g., "ryu.lib.ovs_ofctl" or ""ryu.lib.ofctl")
But NOT strong will, and the current implementation works well with short codes.
On 2017年05月02日 16:19, IWAMOTO Toshihiro wrote:
> This commit adds a new method called ofp_instruction_from_str,
> which takes an ovs-ofctl style action string and returns a list of
> OFPInstructionActions. Currently only a few action strings are
> understood.
>
> Signed-off-by: IWAMOTO Toshihiro <[email protected]>
> ---
> diff --git a/ryu/ofproto/ofproto_parser.py b/ryu/ofproto/ofproto_parser.py
> ...(snip)
> +
> +def tokenize_ofp_instruction_arg(arg):
> + """
> + Tokenize an argument portion of ovs-ofctl style action string.
> + """
> + arg_re = re.compile("[^,()]*")
> + try:
> + rest = arg
> + result = []
> + while len(rest):
> + m = arg_re.match(rest)
> + if m.end(0) == len(rest):
> + result.append(rest)
> + return result
> + if rest[m.end(0)] == '(':
> + this_block, rest = _tokenize_paren_block(
> + rest, m.end(0) + 1)
> + result.append(this_block)
> + elif rest[m.end(0)] == ',':
> + result.append(m.group(0))
> + rest = rest[m.end(0):]
> + else: # is ')'
> + raise Exception
> + if len(rest):
> + assert rest[0] == ','
> + rest = rest[1:]
> + return result
> + except Exception:
> + raise ryu.exception.OFPInvalidActionString(action_str=arg)
"ryu.exception" cannot be access from here because it is imported with
"from ryu import exception".
It should be like "exception.OFPInvalidActionString(action_str=arg)"?
Thanks,
Iwase
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