def register_down_segment(self, pcb):
"""
Send down-segment to Core Path Server
"""
pcb.sign(self.signing_key)
core_path = pcb.get_path(reverse_direction=True)
records = PathRecordsReg.from_values({PST.DOWN: [pcb]})
dst_ia = pcb.asm(0).isd_as()
meta = self._build_meta(ia=dst_ia, host=SVCType.PS_A, path=core_path, reuse=True)
self.send_meta(CtrlPayload(PathMgmt(records)), meta)
return meta
def register_down_segment(self, pcb):
"""
Send down-segment to Core Path Server
"""
core_path = pcb.get_path(reverse_direction=True)
records = PathRecordsReg.from_values({PST.DOWN: [pcb]})
dst_ia = pcb.asm(0).isd_as()
meta = self.DefaultMeta.from_values(ia=dst_ia,
host=SVCType.PS_A,
path=core_path)
self.send_meta(records, meta)
def register_up_segment(self, pcb, svc_type):
"""
Send up-segment to Local Path Servers and Sibra Servers
:raises:
SCIONServiceLookupError: service type lookup failure
"""
records = PathRecordsReg.from_values({PST.UP: [pcb]})
addr, port = self.dns_query_topo(svc_type)[0]
meta = self._build_meta(host=addr, port=port)
self.send_meta(records, meta)
return meta
def register_core_segment(self, pcb, svc_type):
"""
Send core-segment to Local Path Servers and Sibra Servers
:raises:
SCIONServiceLookupError: service type lookup failure
"""
pcb.sign(self.signing_key)
# Register core path with local core path server.
addr, port = self.dns_query_topo(svc_type)[0]
records = PathRecordsReg.from_values({PST.CORE: [pcb]})
meta = self._build_meta(host=addr, port=port, reuse=True)
self.send_meta(CtrlPayload(PathMgmt(records.copy())), meta)
return meta
def register_up_segment(self, pcb):
"""
Send up-segment to Local Path Servers and Sibra Servers
:raises:
SCIONServiceLookupError: path server lookup failure
"""
records = PathRecordsReg.from_values({PST.UP: [pcb]})
addr, port = self.dns_query_topo(PATH_SERVICE)[0]
meta = self.DefaultMeta.from_values(host=addr, port=port)
self.send_meta(records.copy(), meta)
addr, port = self.dns_query_topo(SIBRA_SERVICE)[0]
meta = self.DefaultMeta.from_values(host=addr, port=port)
self.send_meta(records, meta)
def _create_reg_pkt(self, type_, remote=False):
if remote:
dst_ia = self.remote
path = self.seg.get_path(True)
else:
dst_ia = self.addr.isd_as
path = SCIONPath()
pcb = self._create_reg_pcb(remote)
pld = PathRecordsReg.from_values({type_: [pcb]})
dest = SCIONAddr.from_values(dst_ia, SVCType.PS_A)
cmn_hdr, addr_hdr = build_base_hdrs(self.addr, dest)
udp_hdr = SCIONUDPHeader.from_values(self.addr, self._port, dest, 0)
return SCIONL4Packet.from_values(cmn_hdr, addr_hdr, path, [], udp_hdr,
pld)
def register_up_segment(self, pcb):
"""
Send up-segment to Local Path Servers and Sibra Servers
:raises:
SCIONServiceLookupError: path server lookup failure
"""
records = PathRecordsReg.from_values({PST.UP: [pcb]})
ps_host = self.dns_query_topo(PATH_SERVICE)[0]
pkt = self._build_packet(ps_host, payload=records.copy())
self.send(pkt, ps_host)
sb_host = self.dns_query_topo(SIBRA_SERVICE)[0]
pkt = self._build_packet(sb_host, payload=records)
self.send(pkt, sb_host)
def register_down_segment(self, pcb):
"""
Send down-segment to Core Path Server
"""
core_path = pcb.get_path(reverse_direction=True)
records = PathRecordsReg.from_values({PST.DOWN: [pcb]})
dst_ia = pcb.asm(0).isd_as()
pkt = self._build_packet(SVCType.PS,
dst_ia=dst_ia,
path=core_path,
payload=records)
fwd_if = core_path.get_fwd_if()
if fwd_if not in self.ifid2er:
raise SCIONKeyError("Invalid IF %d in CorePath" % fwd_if)
next_hop = self.ifid2er[fwd_if].addr
self.send(pkt, next_hop)
def register_core_segment(self, pcb):
"""
Register the core segment contained in 'pcb' with the local core path
server.
"""
pcb.sign(self.signing_key)
# Register core path with local core path server.
try:
addr, port = self.dns_query_topo(PATH_SERVICE)[0]
except SCIONServiceLookupError:
# If there are no local path servers, stop here.
return
records = PathRecordsReg.from_values({PST.CORE: [pcb]})
meta = self.DefaultMeta.from_values(host=addr, port=port)
self.send_meta(records.copy(), meta)
addr, port = self.dns_query_topo(SIBRA_SERVICE)[0]
meta = self.DefaultMeta.from_values(host=addr, port=port)
self.send_meta(records, meta)
def register_core_segment(self, pcb):
"""
Register the core segment contained in 'pcb' with the local core path
server.
"""
pcb.remove_crypto()
pcb.sign(self.signing_key)
# Register core path with local core path server.
try:
ps_addr = self.dns_query_topo(PATH_SERVICE)[0]
except SCIONServiceLookupError:
# If there are no local path servers, stop here.
return
records = PathRecordsReg.from_values({PST.CORE: [pcb]})
pkt = self._build_packet(ps_addr, payload=records.copy())
self.send(pkt, ps_addr)
sb_host = self.dns_query_topo(SIBRA_SERVICE)[0]
pkt = self._build_packet(sb_host, payload=records)
self.send(pkt, sb_host)