def path_resolution(self, req, meta, new_request=True, logger=None):
"""
Handle generic type of a path request.
"""
if logger is None:
logger = self.get_request_logger(req, meta)
dst_ia = req.dst_ia()
if new_request:
logger.info("PATH_REQ received")
REQS_TOTAL.labels(**self._labels).inc()
if dst_ia == self.addr.isd_as:
logger.warning("Dropping request: requested DST is local AS")
return False
up_segs = set()
core_segs = set()
down_segs = set()
# dst as==0 means any core AS in the specified ISD
if self.is_core_as(dst_ia) or dst_ia[1] == 0:
self._resolve_core(req, up_segs, core_segs)
else:
self._resolve_not_core(req, up_segs, core_segs, down_segs)
if up_segs | core_segs | down_segs:
self._send_path_segments(req, meta, logger, up_segs, core_segs, down_segs)
return True
if new_request:
self._request_paths_from_core(req, logger)
self.pending_req[(dst_ia, req.p.flags.sibra)].append((req, meta, logger))
return False
def path_resolution(self, cpld, meta, new_request=True, logger=None):
"""
Handle generic type of a path request.
"""
pmgt = cpld.union
req = pmgt.union
assert isinstance(req, PathSegmentReq), type(req)
if logger is None:
logger = self.get_request_logger(cpld.req_id_str(), meta)
dst_ia = req.dst_ia()
if new_request:
logger.info("PATH_REQ received: %s", req)
REQS_TOTAL.labels(**self._labels).inc()
if dst_ia == self.addr.isd_as:
logger.warning("Dropping request: requested DST is local AS")
return False
up_segs = set()
core_segs = set()
down_segs = set()
# dst as==0 means any core AS in the specified ISD
if self.is_core_as(dst_ia) or dst_ia[1] == 0:
self._resolve_core(req, up_segs, core_segs)
else:
self._resolve_not_core(req, up_segs, core_segs, down_segs, logger)
if up_segs | core_segs | down_segs:
self._send_path_segments(req, cpld.req_id, meta, logger, up_segs,
core_segs, down_segs)
return True
if new_request:
with self.pen_req_lock:
self.pending_req[(dst_ia, req.p.flags.sibra)][str(meta)] = (
req, cpld.req_id, meta, logger)
self._request_paths_from_core(req, logger)
return False
def path_resolution(self, req, meta, new_request=True, logger=None):
"""
Handle generic type of a path request.
new_request informs whether a pkt is a new request (True), or is a
pending request (False).
Return True when resolution succeeded, False otherwise.
"""
if logger is None:
logger = self.get_request_logger(req, meta)
dst_ia = req.dst_ia()
if new_request:
logger.info("PATH_REQ received")
REQS_TOTAL.labels(**self._labels).inc()
if dst_ia == self.addr.isd_as:
logger.warning("Dropping request: requested DST is local AS")
return False
# dst as==0 means any core AS in the specified ISD
dst_is_core = self.is_core_as(dst_ia) or dst_ia[1] == 0
if dst_is_core:
core_segs = self._resolve_core(
req, meta, dst_ia, new_request, req.flags(), logger)
down_segs = set()
else:
core_segs, down_segs = self._resolve_not_core(
req, meta, dst_ia, new_request, req.flags(), logger)
if not (core_segs | down_segs):
if new_request:
logger.debug("Segs to %s not found." % dst_ia)
return False
self._send_path_segments(req, meta, logger, core=core_segs, down=down_segs)
return True