def validate(self): # pragma: no cover
if self.dst.host.TYPE == AddrType.SVC:
if self.dst.host.anycast() not in [SVCType.BS_A, SVCType.PS_A,
SVCType.CS_A, SVCType.SB_A]:
raise SCMPBadHost("Invalid dest SVC: %s" % self.dst.host.addr)
if self.src.host.TYPE == AddrType.SVC:
raise SCMPBadSrcType("Invalid source type: SVC")
def process_ifid_request(self, pkt, from_local):
"""
After receiving IFID_PKT from neighboring router it is completed (by
iface information) and passed to local BSes.
:param ifid_packet: the IFID request packet to send.
:type ifid_packet: :class:`lib.packet.scion.IFIDPacket`
"""
if from_local:
logging.error("Received IFID packet from local AS, dropping")
return
if pkt.addrs.dst.host != SVCType.BS:
raise SCMPBadHost("Invalid SVC address: %s", pkt.addrs.dst.host)
ifid_pld = pkt.get_payload().copy()
# Forward 'alive' packet to all BSes (to inform that neighbor is alive).
# BS must determine interface.
ifid_pld.p.relayIF = self.interface.if_id
try:
bs_addrs = self.dns_query_topo(BEACON_SERVICE)
except SCIONServiceLookupError as e:
logging.error("Unable to deliver ifid packet: %s", e)
raise SCMPUnknownHost
for bs_addr in bs_addrs:
pkt.set_payload(ifid_pld.copy())
self.send(pkt, bs_addr)
def validate(self): # pragma: no cover
if self.dst.host.TYPE == AddrType.SVC and self.dst.host not in [
SVCType.BS, SVCType.PS, SVCType.CS, SVCType.SB
]:
raise SCMPBadHost("Invalid dest SVC: %s" % self.dst.host.addr)