openstack/os-ken
Code Issues Proposed changes

lldp: fixed SystemCapabilities TLV

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This patch removes 'Subtype' byte from SystemCapabilities TLV.
There was an inconsistency in offical IEEE document which was corrected
in 802.1AB-2009/Cor 1-2013.

Signed-off-by: Marcin Chron <marcin_miko1@o2.pl>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
Marcin Chron 2018-05-17 23:32:17 +02:00 committed by FUJITA Tomonori
parent c29c9019ac
commit 99fc573a9c
2 changed files with 7 additions and 12 deletions
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15
ryu/lib/packet/lldp.py
View File

@ -455,13 +455,12 @@ class SystemCapabilities(LLDPBasicTLV):
Attribute Description
================= =====================================
buf Binary data to parse.
subtype Subtype.
system_cap System Capabilities.
enabled_cap Enabled Capabilities.
================= =====================================
"""
# chassis subtype(1) + system cap(2) + enabled cap(2)
_PACK_STR = '!BHH'
# system cap(2) + enabled cap(2)
_PACK_STR = '!HH'
_PACK_SIZE = struct.calcsize(_PACK_STR)
_LEN_MIN = _PACK_SIZE
_LEN_MAX = _PACK_SIZE
@ -481,10 +480,9 @@ class SystemCapabilities(LLDPBasicTLV):
def __init__(self, buf=None, *args, **kwargs):
super(SystemCapabilities, self).__init__(buf, *args, **kwargs)
if buf:
(self.subtype, self.system_cap, self.enabled_cap) = \
struct.unpack(self._PACK_STR, self.tlv_info[:self._PACK_SIZE])
(self.system_cap, self.enabled_cap) = struct.unpack(
self._PACK_STR, self.tlv_info[:self._PACK_SIZE])
else:
self.subtype = kwargs['subtype']
self.system_cap = kwargs['system_cap']
self.enabled_cap = kwargs['enabled_cap']
self.len = self._PACK_SIZE
@ -492,9 +490,8 @@ class SystemCapabilities(LLDPBasicTLV):
self.typelen = (self.tlv_type << LLDP_TLV_TYPE_SHIFT) | self.len
def serialize(self):
return struct.pack('!HBHH',
self.typelen, self.subtype,
self.system_cap, self.enabled_cap)
return struct.pack('!HHH',
self.typelen, self.system_cap, self.enabled_cap)
@lldp.set_tlv_type(LLDP_TLV_MANAGEMENT_ADDRESS)

4
ryu/tests/unit/packet/test_lldp.py
View File

@ -227,8 +227,7 @@ class TestLLDPOptionalTLV(unittest.TestCase):
+ b'\x73\x74\x65\x72\x20\x30\x35\x2f' \
+ b'\x32\x37\x2f\x30\x35\x20\x30\x34' \
+ b'\x3a\x35\x33\x3a\x31\x31\x00\x0e' \
+ b'\x05\x01\x00\x14\x00\x14\x10\x0e' \
+ b'\x07' \
+ b'\x04\x00\x14\x00\x14\x10\x0e\x07' \
+ b'\x06\x00\x01\x30\xf9\xad\xa0\x02' \
+ b'\x00\x00\x03\xe9\x00\xfe\x07\x00' \
+ b'\x12\x0f\x02\x07\x01\x00\xfe\x09' \
@ -274,7 +273,6 @@ class TestLLDPOptionalTLV(unittest.TestCase):
# SystemCapabilities
eq_(tlvs[6].tlv_type, lldp.LLDP_TLV_SYSTEM_CAPABILITIES)
eq_(tlvs[6].subtype, lldp.ChassisID.SUB_CHASSIS_COMPONENT)
eq_(tlvs[6].system_cap & lldp.SystemCapabilities.CAP_MAC_BRIDGE,
lldp.SystemCapabilities.CAP_MAC_BRIDGE)
eq_(tlvs[6].enabled_cap & lldp.SystemCapabilities.CAP_MAC_BRIDGE,