def handle_ifid_packet(self, pld, meta):
"""
Update the interface state for the corresponding interface.
:param pld: The IFIDPayload.
:type pld: IFIDPayload
"""
ifid = pld.p.relayIF
with self.ifid_state_lock:
if ifid not in self.ifid_state:
raise SCIONKeyError("Invalid IF %d in IFIDPayload" % ifid)
br = self.ifid2br[ifid]
br.interfaces[ifid].to_if_id = pld.p.origIF
prev_state = self.ifid_state[ifid].update()
if prev_state == InterfaceState.INACTIVE:
logging.info("IF %d activated", ifid)
elif prev_state in [
InterfaceState.TIMED_OUT, InterfaceState.REVOKED
]:
logging.info("IF %d came back up.", ifid)
if not prev_state == InterfaceState.ACTIVE:
if self.zk.have_lock():
# Inform BRs about the interface coming up.
state_info = IFStateInfo.from_values(
ifid, True, self._get_ht_proof(ifid))
pld = IFStatePayload.from_values([state_info])
for br in self.topology.border_routers:
br_addr, br_port = br.int_addrs[0].public[0]
meta = UDPMetadata.from_values(host=br_addr,
port=br_port)
self.send_meta(pld.copy(), meta, (br_addr, br_port))
def _handle_ifstate_request(self, req, meta):
# Only master replies to ifstate requests.
if not self.zk.have_lock():
return
assert isinstance(req, IFStateRequest)
infos = []
with self.ifid_state_lock:
if req.p.ifID == IFStateRequest.ALL_INTERFACES:
ifid_states = self.ifid_state.items()
elif req.p.ifID in self.ifid_state:
ifid_states = [(req.p.ifID, self.ifid_state[req.p.ifID])]
else:
logging.error(
"Received ifstate request from %s for unknown "
"interface %s.", meta, req.p.ifID)
return
for (ifid, state) in ifid_states:
# Don't include inactive interfaces in response.
if state.is_inactive():
continue
info = IFStateInfo.from_values(ifid, state.is_active(),
self._get_ht_proof(ifid))
infos.append(info)
if not infos and not self._quiet_startup():
logging.warning("No IF state info to put in response. Req: %s" %
req.short_desc())
return
payload = IFStatePayload.from_values(infos)
self.send_meta(payload, meta, (meta.host, meta.port))
def _handle_ifstate_request(self, cpld, meta):
# Only master replies to ifstate requests.
pmgt = cpld.union
req = pmgt.union
assert isinstance(req, IFStateRequest), type(req)
if not self.zk.have_lock():
return
with self.ifid_state_lock:
infos = []
for (ifid, state) in self.ifid_state.items():
# Don't include inactive interfaces in update.
if state.is_inactive():
continue
srev_info = None
if state.is_revoked():
srev_info = self.if_revocations.get(ifid, None)
if not srev_info:
logging.warning(
"No revocation in cache for revoked IFID: %s",
ifid)
continue
infos.append(
IFStateInfo.from_values(ifid, state.is_active(),
srev_info))
if not infos and not self._quiet_startup():
logging.warning(
"No IF state info to put in IFState update for %s.", meta)
return
self._send_ifstate_update(infos, [meta])
def _handle_ifstate_request(self, mgmt_pkt):
# Only master replies to ifstate requests.
if not self.zk.have_lock():
return
req = mgmt_pkt.get_payload()
assert isinstance(req, IFStateRequest)
logging.debug("Received ifstate req:\n%s", mgmt_pkt)
infos = []
if req.p.ifID == IFStateRequest.ALL_INTERFACES:
ifid_states = self.ifid_state.items()
elif req.p.ifID in self.ifid_state:
ifid_states = [(req.p.ifID, self.ifid_state[req.p.ifID])]
else:
logging.error(
"Received ifstate request from %s for unknown "
"interface %s.", mgmt_pkt.addrs.src, req.p.ifID)
return
for (ifid, state) in ifid_states:
# Don't include inactive interfaces in response.
if state.is_inactive():
continue
chain = self._get_if_hash_chain(ifid)
info = IFStateInfo.from_values(ifid, state.is_active(),
chain.next_element())
infos.append(info)
if not infos and not self._quiet_startup():
logging.warning("No IF state info to put in response.")
return
payload = IFStatePayload.from_values(infos)
state_pkt = self._build_packet(mgmt_pkt.addrs.src.host,
payload=payload)
self.send(state_pkt, mgmt_pkt.addrs.src.host)
def handle_ifid_packet(self, cpld, meta):
"""
Update the interface state for the corresponding interface.
:param pld: The IFIDPayload.
:type pld: IFIDPayload
"""
pld = cpld.union
assert isinstance(pld, IFIDPayload), type(pld)
ifid = meta.pkt.path.get_hof().ingress_if
with self.ifid_state_lock:
if ifid not in self.ifid_state:
raise SCIONKeyError("Invalid IF %d in IFIDPayload" % ifid)
br = self.ifid2br[ifid]
br.interfaces[ifid].to_if_id = pld.p.origIF
prev_state = self.ifid_state[ifid].update()
if prev_state == InterfaceState.INACTIVE:
logging.info("IF %d activated.", ifid)
elif prev_state in [
InterfaceState.TIMED_OUT, InterfaceState.REVOKED
]:
logging.info("IF %d came back up.", ifid)
if prev_state != InterfaceState.ACTIVE:
if self.zk.have_lock():
# Inform BRs about the interface coming up.
metas = []
for br in self.topology.border_routers:
br_addr, br_port = br.ctrl_addrs.public
metas.append(
UDPMetadata.from_values(host=br_addr,
port=br_port))
info = IFStateInfo.from_values(ifid, True)
self._send_ifstate_update([info], metas)
def handle_ifid_packet(self, pkt):
"""
Update the interface state for the corresponding interface.
:param ipkt: The IFIDPayload.
:type ipkt: IFIDPayload
"""
payload = pkt.get_payload()
ifid = payload.p.relayIF
if ifid not in self.ifid_state:
raise SCIONKeyError("Invalid IF %d in IFIDPayload" % ifid)
er = self.ifid2er[ifid]
er.interface.to_if_id = payload.p.origIF
prev_state = self.ifid_state[ifid].update()
if prev_state == InterfaceState.INACTIVE:
logging.info("IF %d activated", ifid)
elif prev_state in [InterfaceState.TIMED_OUT, InterfaceState.REVOKED]:
logging.info("IF %d came back up.", ifid)
if not prev_state == InterfaceState.ACTIVE:
if self.zk.have_lock():
# Inform ERs about the interface coming up.
chain = self._get_if_hash_chain(ifid)
if chain is None:
return
state_info = IFStateInfo.from_values(ifid, True,
chain.current_element())
pld = IFStatePayload.from_values([state_info])
mgmt_packet = self._build_packet()
for er in self.topology.get_all_edge_routers():
if er.interface.if_id != ifid:
mgmt_packet.addrs.dst.host = er.addr
mgmt_packet.set_payload(pld.copy())
self.send(mgmt_packet, er.addr)
def _issue_revocation(self, if_id, chain):
"""
Store a RevocationObject in ZK and send a revocation to all ERs.
:param if_id: The interface that needs to be revoked.
:type if_id: int
:param chain: The hash chain corresponding to if_id.
:type chain: :class:`lib.crypto.hash_chain.HashChain`
"""
# Only the master BS issues revocations.
if not self.zk.have_lock():
return
rev_info = RevocationInfo.from_values(chain.next_element())
logging.info("Storing revocation in ZK.")
rev_obj = RevocationObject.from_values(if_id, chain.current_index(),
chain.next_element())
entry_name = "%s:%s" % (chain.start_element(hex_=True),
chain.next_element(hex_=True))
self.revobjs_cache.store(entry_name, rev_obj.pack())
logging.info("Issuing revocation for IF %d.", if_id)
# Issue revocation to all ERs.
info = IFStateInfo.from_values(if_id, False, chain.next_element())
pld = IFStatePayload.from_values([info])
state_pkt = self._build_packet()
for er in self.topology.get_all_edge_routers():
state_pkt.addrs.dst.host = er.addr
state_pkt.set_payload(pld.copy())
self.send(state_pkt, er.addr)
self._process_revocation(rev_info, if_id)
def _issue_revocations(self, revoked_ifs):
"""
Store a RevocationInfo in ZK and send a revocation to all BRs.
:param list revoked_ifs: A list of interfaces that needs to be revoked.
"""
# Only the master BS issues revocations.
if not self.zk.have_lock():
return
# Process revoked interfaces.
infos = []
for if_id in revoked_ifs:
rev_info = self._get_ht_proof(if_id)
logging.info("Issuing revocation: %s", rev_info.short_desc())
if self._labels:
REVOCATIONS_ISSUED.labels(**self._labels).inc()
self._process_revocation(rev_info)
infos.append(IFStateInfo.from_values(if_id, False, rev_info))
border_metas = []
# Add all BRs.
for br in self.topology.border_routers:
br_addr, br_port = br.int_addrs[0].public[0]
border_metas.append(
UDPMetadata.from_values(host=br_addr, port=br_port))
# Add local path server.
ps_meta = []
if self.topology.path_servers:
try:
addr, port = self.dns_query_topo(PATH_SERVICE)[0]
except SCIONServiceLookupError:
addr, port = None, None
# Create a meta if there is a local path service
if addr:
ps_meta.append(UDPMetadata.from_values(host=addr, port=port))
self._send_ifstate_update(infos, border_metas, ps_meta)
def _issue_revocations(self, revoked_ifs):
"""
Store a RevocationInfo in ZK and send a revocation to all BRs.
:param list revoked_ifs: A list of interfaces that needs to be revoked.
"""
# Only the master BS issues revocations.
if not self.zk.have_lock():
return
# Process revoked interfaces.
infos = []
for if_id in revoked_ifs:
br = self.ifid2br[if_id]
rev_info = RevocationInfo.from_values(
self.addr.isd_as, if_id, br.interfaces[if_id].link_type,
int(time.time()), self.REVOCATION_TTL)
logging.info("Issuing revocation: %s", rev_info.short_desc())
if self._labels:
REVOCATIONS_ISSUED.labels(**self._labels).inc()
chain = self._get_my_cert()
_, cert_ver = chain.get_leaf_isd_as_ver()
src = DefaultSignSrc.from_values(
rev_info.isd_as(), cert_ver,
self._get_my_trc().version).pack()
srev_info = SignedRevInfo.from_values(rev_info.copy().pack(),
ProtoSignType.ED25519, src)
srev_info.sign(self.signing_key)
# Add to revocation cache
self.if_revocations[if_id] = srev_info
self._process_revocation(srev_info)
infos.append(IFStateInfo.from_values(if_id, False, srev_info))
border_metas = []
# Add all BRs.
for br in self.topology.border_routers:
br_addr, br_port = br.int_addrs.public[0]
border_metas.append(
UDPMetadata.from_values(host=br_addr, port=br_port))
# Add local path server.
ps_meta = []
if self.topology.path_servers:
try:
addr, port = self.dns_query_topo(ServiceType.PS)[0]
except SCIONServiceLookupError:
addr, port = None, None
# Create a meta if there is a local path service
if addr:
ps_meta.append(UDPMetadata.from_values(host=addr, port=port))
self._send_ifstate_update(infos, border_metas, ps_meta)
def process_path_mgmt_packet(self, mgmt_pkt, from_local_as):
"""
Process path management packets.
:param mgmt_pkt: The path mgmt packet.
:type mgmt_pkt: :class:`lib.packet.path_mgmt.PathMgmtPacket`
:param bool from_local_as:
whether or not the packet is from the local AS.
"""
payload = mgmt_pkt.get_payload()
if payload.PAYLOAD_TYPE == PMT.IFSTATE_INFOS:
# handle state update
logging.debug("Received IFState update:\n%s",
str(mgmt_pkt.get_payload()))
for p in payload.p.infos:
self.if_states[p.ifID].update(IFStateInfo(p))
return
self.handle_data(mgmt_pkt, from_local_as)
def _send_ifstate_update(self, border_metas, server_metas=None):
server_metas = server_metas or []
with self.ifid_state_lock:
infos = []
for (ifid, state) in self.ifid_state.items():
# Don't include inactive interfaces in update.
if state.is_inactive():
continue
rev_info = self._get_ht_proof(ifid) if state.is_revoked() else None
info = IFStateInfo.from_values(ifid, state.is_active(), rev_info)
infos.append(info)
if not infos and not self._quiet_startup():
logging.warning("No IF state info to put in IFState update for %s.",
", ".join([str(m) for m in border_metas + server_metas]))
return
payload = IFStatePayload.from_values(infos)
for meta in border_metas:
self.send_meta(payload.copy(), meta, (meta.host, meta.port))
for meta in server_metas:
self.send_meta(payload.copy(), meta)
def _issue_revocation(self, if_id):
"""
Store a RevocationInfo in ZK and send a revocation to all BRs.
:param if_id: The interface that needs to be revoked.
:type if_id: int
"""
# Only the master BS issues revocations.
if not self.zk.have_lock():
return
rev_info = self._get_ht_proof(if_id)
logging.error("Issuing revocation for IF %d.", if_id)
# Issue revocation to all BRs.
info = IFStateInfo.from_values(if_id, False, rev_info)
pld = IFStatePayload.from_values([info])
for br in self.topology.get_all_border_routers():
meta = UDPMetadata.from_values(host=br.addr, port=br.port)
self.send_meta(pld.copy(), meta, (br.addr, br.port))
self._process_revocation(rev_info)
self._send_rev_to_local_ps(rev_info)
def _issue_revocation(self, if_id):
"""
Store a RevocationInfo in ZK and send a revocation to all BRs.
:param if_id: The interface that needs to be revoked.
:type if_id: int
"""
# Only the master BS issues revocations.
if not self.zk.have_lock():
return
rev_info = self._get_ht_proof(if_id)
logging.info("Issuing revocation: %s", rev_info.short_desc())
if self._labels:
REVOCATIONS_ISSUED.labels(**self._labels).inc()
# Issue revocation to all BRs.
info = IFStateInfo.from_values(if_id, False, rev_info)
pld = IFStatePayload.from_values([info])
for br in self.topology.border_routers:
br_addr, br_port = br.int_addrs[0].public[0]
meta = UDPMetadata.from_values(host=br_addr, port=br_port)
self.send_meta(pld.copy(), meta, (br_addr, br_port))
self._process_revocation(rev_info)
self._send_rev_to_local_ps(rev_info)
