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ReadPropertySummaryFilter.py
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ReadPropertySummaryFilter.py
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#!/usr/bin/python
"""
This application collects Read Property requests, finds the matching Complex
Ack responses, and prints out a list of those messages. This is useful for
finding missing requests and looking at the variation in response times which
might be an indication of a network that intermittently fails or is
saturated.
This application accepts the same --source, --destination, and --host options
as the other filters, and accepts the debugging options of other BACpypes
applications.
"""
from bacpypes.debugging import bacpypes_debugging, ModuleLogger
from bacpypes.consolelogging import ArgumentParser
from bacpypes.pdu import Address
from bacpypes.analysis import trace, strftimestamp, Tracer
from bacpypes.apdu import ReadPropertyRequest, ReadPropertyACK
# some debugging
_debug = 0
_log = ModuleLogger(globals())
# globals
filterSource = None
filterDestination = None
filterHost = None
filterEval = None
# dictionary of pending requests
requests = {}
# all traffic
traffic = []
#
# Traffic
#
class Traffic:
def __init__(self, req):
self.req = req
self.resp = None
self.ts = req._timestamp
self.retry = 1
#
# Match
#
@bacpypes_debugging
def Match(addr1, addr2):
"""Return true iff addr1 matches addr2."""
if _debug:
Match._debug("Match %r %r", addr1, addr2)
if addr2.addrType == Address.localBroadcastAddr:
# match any local station
return (addr1.addrType == Address.localStationAddr) or (
addr1.addrType == Address.localBroadcastAddr
)
elif addr2.addrType == Address.localStationAddr:
# match a specific local station
return (addr1.addrType == Address.localStationAddr) and (
addr1.addrAddr == addr2.addrAddr
)
elif addr2.addrType == Address.remoteBroadcastAddr:
# match any remote station or remote broadcast on a matching network
return (
(addr1.addrType == Address.remoteStationAddr)
or (addr1.addrType == Address.remoteBroadcastAddr)
) and (addr1.addrNet == addr2.addrNet)
elif addr2.addrType == Address.remoteStationAddr:
# match a specific remote station
return (
(addr1.addrType == Address.remoteStationAddr)
and (addr1.addrNet == addr2.addrNet)
and (addr1.addrAddr == addr2.addrAddr)
)
elif addr2.addrType == Address.globalBroadcastAddr:
# match a global broadcast address
return addr1.addrType == Address.globalBroadcastAddr
else:
raise RuntimeError("invalid match combination")
#
# ReadPropertySummary
#
@bacpypes_debugging
class ReadPropertySummary(Tracer):
def __init__(self):
if _debug:
ReadPropertySummary._debug("__init__")
Tracer.__init__(self, self.Filter)
def Filter(self, pkt):
if _debug:
ReadPropertySummary._debug("Filter %r", pkt)
global requests
# apply the filters
if filterSource:
if not Match(pkt.pduSource, filterSource):
if _debug:
ReadPropertySummary._debug(" - source filter fail")
return
if filterDestination:
if not Match(pkt.pduDestination, filterDestination):
if _debug:
ReadPropertySummary._debug(" - destination filter fail")
return
if filterHost:
if (not Match(pkt.pduSource, filterHost)) and (
not Match(pkt.pduDestination, filterHost)
):
if _debug:
ReadPropertySummary._debug(" - host filter fail")
return
if filterEval:
try:
matches = eval(filterEval, {"pkt": pkt})
if not matches:
if _debug:
ReadPropertySummary._debug(" - eval filter fail")
return
except:
if _debug:
ReadPropertySummary._debug(" - eval filter massive fail")
return
# check for reads
if isinstance(pkt, ReadPropertyRequest):
key = (pkt.pduSource, pkt.pduDestination, pkt.apduInvokeID)
if key in requests:
if _debug:
ReadPropertySummary._debug(" - retry")
requests[key].retry += 1
else:
if _debug:
ReadPropertySummary._debug(" - new request")
msg = Traffic(pkt)
requests[key] = msg
traffic.append(msg)
# now check for results
elif isinstance(pkt, ReadPropertyACK):
key = (pkt.pduDestination, pkt.pduSource, pkt.apduInvokeID)
req = requests.get(key, None)
if req:
if _debug:
ReadPropertySummary._debug(" - matched with request")
requests[key].resp = pkt
# delete the request, it stays in the traffic list
del requests[key]
else:
if _debug:
ReadPropertySummary._debug(" - unmatched")
#
# __main__
#
# parse the command line arguments
parser = ArgumentParser(description=__doc__)
parser.add_argument("-s", "--source", nargs="?", type=str, help="source address")
parser.add_argument(
"-d", "--destination", nargs="?", type=str, help="destination address"
)
parser.add_argument("--host", nargs="?", type=str, help="source or destination")
parser.add_argument("pcap", nargs="+", type=str, help="pcap file(s)")
args = parser.parse_args()
if _debug:
_log.debug("initialization")
if _debug:
_log.debug(" - args: %r", args)
# interpret the arguments
if args.source:
filterSource = Address(args.source)
if _debug:
_log.debug(" - filterSource: %r", filterSource)
if args.destination:
filterDestination = Address(args.destination)
if _debug:
_log.debug(" - filterDestination: %r", filterDestination)
if args.host:
filterHost = Address(args.host)
if _debug:
_log.debug(" - filterHost: %r", filterHost)
# start out with no unmatched requests
requests = {}
# trace the file(s)
for fname in args.pcap:
trace(fname, [ReadPropertySummary])
# dump everything
for msg in traffic:
req = msg.req
resp = msg.resp
if resp:
deltatime = (resp._timestamp - req._timestamp) * 1000
print(
"%s\t%s\t%s\t%6.2fms\t%s"
% (
strftimestamp(req._timestamp),
req.pduSource,
resp.pduSource,
deltatime,
msg.retry if (msg.retry != 1) else "",
)
)
else:
print(
"%s\t%s\t%s\t%6.2fms\t%s"
% (
strftimestamp(req._timestamp),
req.pduSource,
"-",
0,
msg.retry if (msg.retry != 1) else "",
)
)