def test(self, raw):
inst = SibraOpaqueField()
data = create_mock(["pop"])
data.pop.side_effect = bytes(range(4)), "mac"
raw.return_value = data
# Call
inst._parse("data")
# Tests
raw.assert_called_once_with("data", inst.NAME, inst.LEN)
ntools.eq_(inst.ingress, 0x0001)
ntools.eq_(inst.egress, 0x0203)
ntools.eq_(inst.mac, "mac")
def test_steady_no_prev(self, cbcmac):
inst = SibraOpaqueField()
inst.ingress = 0x1111
inst.egress = 0xFFFF
cbcmac.return_value = "cbcmac"
info = create_mock(["LEN", "pack"])
info.LEN = 8
info.pack.return_value = b"packinfo"
# Call
ntools.eq_(inst.calc_mac(info, "key", [b"path id0"]), "cbcm")
# Tests
cbcmac.assert_called_once_with("key", b"".join([
bytes.fromhex("1111 FFFF"), b"packinfo", b"path id0",
bytes(inst.MAX_PATH_IDS_LEN - 8), bytes(8),
bytes(inst.MAC_BLOCK_PADDING),
]))
def test_ephemeral_prev(self, cbcmac):
inst = SibraOpaqueField()
inst.ingress = 0x1111
inst.egress = 0xFFFF
cbcmac.return_value = "cbcmac"
info = create_mock(["LEN", "pack"])
info.LEN = 8
info.pack.return_value = b"packinfo"
path_ids = b"steadyid", b"ephemeralpath id"
prev_raw = b"deadbeef"
# Call
ntools.eq_(inst.calc_mac(info, "key", path_ids, prev_raw), "cbcm")
# Tests
cbcmac.assert_called_once_with("key", b"".join([
bytes.fromhex("1111 FFFF"), b"packinfo",
b"steadyid", b"ephemeralpath id", bytes(inst.MAX_PATH_IDS_LEN - 24),
prev_raw, bytes(inst.MAC_BLOCK_PADDING),
]))
def add_hop(self, ingress, egress, prev_raw, key, path_ids):
"""
Add a SIBRA Opaque Field to the reservation block. This happens when a
request has been accepted by a hop on the path.
"""
assert len(self.sofs) + 1 <= self.num_hops
sof = SibraOpaqueField.from_values(ingress, egress)
sof.mac = sof.calc_mac(self.info, key, path_ids, prev_raw)
self.sofs.append(sof)
def _parse(self, raw):
data = Raw(raw, self.NAME, self.MIN_LEN, min_=True)
self.info = self.RESVINFO(data.pop(self.RESVINFO.LEN))
self.num_hops = len(data) // SibraOpaqueField.LEN
while data:
raw_sof = data.pop(SibraOpaqueField.LEN)
if raw_sof == bytes(SibraOpaqueField.LEN):
break
self.sofs.append(SibraOpaqueField(raw_sof))
def test(self):
inst = SibraOpaqueField()
inst.ingress = 0x0001
inst.egress = 0x0203
inst.mac = b"mac"
# Call
ntools.eq_(inst.pack(), bytes(range(4)) + b"mac")
def sof(self, idx):
return SibraOpaqueField(self.p.sofs[idx])