diff options
| -rw-r--r-- | ryu/lib/packet/ospf.py | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/ryu/lib/packet/ospf.py b/ryu/lib/packet/ospf.py index a776b94d..0dfda1ab 100644 --- a/ryu/lib/packet/ospf.py +++ b/ryu/lib/packet/ospf.py @@ -349,7 +349,40 @@ class NetworkLSA(LSA): @LSA.register_type(OSPF_SUMMARY_LSA) class SummaryLSA(LSA): - pass + _PACK_STR = '!4sBBH' + _PACK_LEN = struct.calcsize(_PACK_STR) + + def __init__(self, ls_age=0, options=0, type_=OSPF_NETWORK_LSA, + id_='0.0.0.0', adv_router='0.0.0.0', ls_seqnum=0, + checksum=None, length=None, mask='0.0.0.0', tos=0, metric=0): + self.mask = mask + self.tos = tos + self.metric = metric + super(SummaryLSA, self).__init__(ls_age, options, type_, id_, + adv_router, ls_seqnum, checksum, + length) + + @classmethod + def parser(cls, buf): + if len(buf) < cls._PACK_LEN: + raise stream_parser.StreamParser.TooSmallException( + '%d < %d' % (len(buf), cls_PACK_LEN)) + buf = buf[:cls._PACK_LEN] + (mask, tos, metric_fst, metric_lst) = struct.unpack_from(cls._PACK_STR, + buffer(buf)) + mask = addrconv.ipv4.bin_to_text(mask) + metric = metric_fst << 16 | (metric_lst & 0xffff) + return { + "mask": mask, + "tos": tos, + "metric": metric, + } + + def serialize_tail(self): + mask = addrconv.ipv4.text_to_bin(self.mask) + metric_fst = (self.metric >> 16) & 0xff + metric_lst = self.metric & 0xffff + return bytearray(struct.pack(self._PACK_STR, mask, self.tos, metric)) @LSA.register_type(OSPF_ASBR_SUMMARY_LSA) |