#!/usr/bin/env python3# SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause import argparseimport jsonimport pathlibimport pprintimport sys sys.path.append(pathlib.Path(__file__).resolve().parent.as_posix())from lib import YnlFamily, Netlink, NlError  class YnlEncoder(json.JSONEncoder):    def default(self, obj):        if isinstance(obj, bytes):            return bytes.hex(obj)        if isinstance(obj, set):            return list(obj)        return json.JSONEncoder.default(self, obj)  def main():    description = """    YNL CLI utility - a general purpose netlink utility that uses YAML    specs to drive protocol encoding and decoding.    """    epilog = """    The --multi option can be repeated to include several do operations    in the same netlink payload.    """     parser = argparse.ArgumentParser(description=description,                                     epilog=epilog)    parser.add_argument('--spec', dest='spec', type=str, required=True)    parser.add_argument('--schema', dest='schema', type=str)    parser.add_argument('--no-schema', action='store_true')    parser.add_argument('--json', dest='json_text', type=str)     group = parser.add_mutually_exclusive_group()    group.add_argument('--do', dest='do', metavar='DO-OPERATION', type=str)    group.add_argument('--multi', dest='multi', nargs=2, action='append',                       metavar=('DO-OPERATION', 'JSON_TEXT'), type=str)    group.add_argument('--dump', dest='dump', metavar='DUMP-OPERATION', type=str)    group.add_argument('--list-ops', action='store_true')    group.add_argument('--list-msgs', action='store_true')     parser.add_argument('--duration', dest='duration', type=int,                        help='when subscribed, watch for DURATION seconds')    parser.add_argument('--sleep', dest='duration', type=int,                        help='alias for duration')    parser.add_argument('--subscribe', dest='ntf', type=str)    parser.add_argument('--replace', dest='flags', action='append_const',                        const=Netlink.NLM_F_REPLACE)    parser.add_argument('--excl', dest='flags', action='append_const',                        const=Netlink.NLM_F_EXCL)    parser.add_argument('--create', dest='flags', action='append_const',                        const=Netlink.NLM_F_CREATE)    parser.add_argument('--append', dest='flags', action='append_const',                        const=Netlink.NLM_F_APPEND)    parser.add_argument('--process-unknown', action=argparse.BooleanOptionalAction)    parser.add_argument('--output-json', action='store_true')    parser.add_argument('--dbg-small-recv', default=0, const=4000,                        action='store', nargs='?', type=int)    args = parser.parse_args()     def output(msg):        if args.output_json:            print(json.dumps(msg, cls=YnlEncoder))        else:            pprint.PrettyPrinter().pprint(msg)     if args.no_schema:        args.schema = ''     attrs = {}    if args.json_text:        attrs = json.loads(args.json_text)     ynl = YnlFamily(args.spec, args.schema, args.process_unknown,                    recv_size=args.dbg_small_recv)    if args.dbg_small_recv:        ynl.set_recv_dbg(True)     if args.ntf:        ynl.ntf_subscribe(args.ntf)     if args.list_ops:        for op_name, op in ynl.ops.items():            print(op_name, " [", ", ".join(op.modes), "]")    if args.list_msgs:        for op_name, op in ynl.msgs.items():            print(op_name, " [", ", ".join(op.modes), "]")     try:        if args.do:            reply = ynl.do(args.do, attrs, args.flags)            output(reply)        if args.dump:            reply = ynl.dump(args.dump, attrs)            output(reply)        if args.multi:            ops = [ (item[0], json.loads(item[1]), args.flags or []) for item in args.multi ]            reply = ynl.do_multi(ops)            output(reply)    except NlError as e:        print(e)        exit(1)     if args.ntf:        try:            for msg in ynl.poll_ntf(duration=args.duration):                output(msg)        except KeyboardInterrupt:            pass  if __name__ == "__main__":    main()