def _parse_block(self, data, num_hops, steady=True):
"""Parse a reservation block."""
block_len = (1 + num_hops) * self.LINE_LEN
block = data.pop(block_len)
if steady:
return ResvBlockSteady(block)
return ResvBlockEphemeral(block)
def setup_from_values(cls, req_info, total_hops, path_id,
setup=True): # pragma: no cover
"""Construct a setup request header."""
inst = cls()
inst.setup = setup
inst.total_hops = total_hops
inst.path_ids = [path_id]
inst.req_block = ResvBlockSteady.from_values(req_info, inst.total_hops)
inst._parse_src_ia()
inst._set_size()
return inst
def _sibra_strip_pcb(self, pcb):
assert pcb.is_sibra()
pcb_ext = pcb.sibra_ext
resv_info = pcb_ext.info
resv = ResvBlockSteady.from_values(resv_info, pcb.get_n_hops())
asms = pcb.iter_asms()
if pcb_ext.p.up:
asms = reversed(list(asms))
iflist = []
for sof, asm in zip(pcb_ext.iter_sofs(), asms):
resv.sofs.append(sof)
iflist.extend(self._sibra_add_ifs(
asm.isd_as(), sof, resv_info.fwd_dir))
assert resv.num_hops == len(resv.sofs)
return pcb_ext.p.id, resv, iflist
def teardown(self): # pragma: no cover
"""Shut down the current reservation."""
# FIXME(kormat): not implemented yet in sibra state.
req_info = ResvInfoSteady.from_values(0, BWSnapshot(), 0)
self.req_block = ResvBlockSteady.from_values(req_info, self.total_hops)
self._set_size()