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packet lib: llc: fix reversibility about json

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although LLDP is using internal classes, no class is registered into '_class_prefixes'.
therefore, AssertionError occurs in from_jsondict() when the argument 'control' was processed.
this patch makes from_jsondict() to work correctly by registering internal classes into '_class_prefixes'.

examination code:

    from ryu.lib.packet import llc
    msg1 = llc.llc(dsap_addr=66, ssap_addr=66, control=llc.ControlFormatI())
    print msg1
    jsondict = msg1.to_jsondict()
    msg2 = llc.llc.from_jsondict(jsondict['llc'])
    print msg2
    print str(msg1) == str(msg2)

before applying this patch:

    llc(control=ControlFormatI(pf_bit=0,receive_sequence_number=0,send_sequence_number=0),dsap_addr=66,ssap_addr=66)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/local/lib/python2.7/dist-packages/ryu/lib/stringify.py", line 293, in from_jsondict
        return cls(**dict(kwargs, **additional_args))
      File "/usr/local/lib/python2.7/dist-packages/ryu/lib/packet/llc.py", line 140, in __init__
        assert getattr(control, 'TYPE', None) in self._CTR_TYPES
    AssertionError

after applying this patch:

    llc(control=ControlFormatI(pf_bit=0,receive_sequence_number=0,send_sequence_number=0),dsap_addr=66,ssap_addr=66)
    llc(control=ControlFormatI(pf_bit=0,receive_sequence_number=0,send_sequence_number=0),dsap_addr=66,ssap_addr=66)
    True

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
Yuichi Ito 2013-12-12 15:34:09 +09:00 committed by FUJITA Tomonori
parent c71af613c9
commit 95d482a7cc
1 changed files with 1 additions and 0 deletions
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ryu/lib/packet/llc.py
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@ -318,3 +318,4 @@ class ControlFormatU(stringify.StringifyMixin):
llc.register_packet_type(bpdu.bpdu, SAP_BPDU)
llc.set_classes(llc._CTR_TYPES)