Hi All

I am trying to use the OPAddon script to measure circuit bandwidth. I use the following input configuration for pathrc input configuration:

[GENERAL]

# Set the host and port where Tor is

# listening for control-connections

control_host = 127.0.0.1

control_port = 9051

[CIRC_MANAGEMENT]

# Size of the maintained pool of circuits

idle_circuits = 3

# TODO: Configure ports to use

[NODE_SELECTION]

# Number of hops to be used in paths and

# a minimum-value for advertised bandwidth

pathlen = 3

min_bw = 1024

# Percentiles

percent_fast = 100

percent_skip = 0

use_all_exits = yes

# UniformGenerator with optionally ordered exits,

# 'uniform = no' --> bandwidth-weighted selection

uniform = no

order_exits = no

# Make use of guard-nodes (yes|no) or a specific

# exit node (nickname or IDHex) for every path

use_guards = yes

#use_exit = xyz

[GEOIP]

# Use GeoIP

use_geoip = no

# yes|no for unique|equal country codes

# ! comment out to don't care

unique_countries = no

# Maximum number of continent crossings: 0-n

# ! comment out to enforce distinct continents

# ! set >= pathlen to not care about

#max_continent_crossings = 2

# Maximum number of ocean crossings: 0-n

# ! comment out to don't care

#max_ocean_crossings = 1

# If echelon is set, OP-Addon will try to find an

# exit in the destination country of the current

# request (exit_country may be used as backup)

# yes|no

# TODO: echelon = yes

# Set country codes for single positions

#entry_country = DE

#middle_country = RU

#exit_country = US

# TODO: excludes = [".."]

[RTT]

# Frequently ping the latencies of complete circuits

# yes|no

ping_circs = no

# Tor socks-properties

socks_host = 127.0.0.1

socks_port = 9050

ping_dummy_host = 127.0.0.1

ping_dummy_port = 100

# Time interval to wait before triggering

# pings and frequency of pings in seconds (float)

initial_interval = 10

frequency = 5

# Close a circuit after n timeouts on measurings

# Set to 0 to never close circs (int)

timeout_limit = 1

[MODEL]

# Set to 'yes' to measure latencies of single links

# and enable circuit creation from the model

# yes|no

network_model = no

# Min ratio of circs created with the backup-method,

# controls growing of the model (float in [0,1])

# 0: no growing

# 1: growing only

min_ratio = 0.5

# RTT-threshhold in seconds when creating circs (float):

# 0: no threshhold, choose from all proposals

max_rtt = 0

# Minimum number of proposals to choose from (int)

min_proposals = 100

[EVALUATE]

# Evaluation mode: close every circuit after measuring performance

# yes|no

evaluate = yes

# Number of latency-tests per circuit (int: 0-n)

num_rtt_tests = 1

# Number of bandwidth-tests per circuit (int:0 or 1)

# Requires stream-server.pl listening on the same host

num_bw_tests = 1

# Total amount of circuits to test (int)

num_records = 5

I run op-addon.py with the above config and it terminates throwing the following error pointing to PathSupport.py.

WARN[Thu Feb 02 17:45:58 2012]:No event for: 650 STREAM 76 CLOSED 47 128.59.16.165:8041 REASON=DONE

Traceback (most recent call last):

File "<home directory>/torflow.saved/torflow-3c0dd74/TorCtl/TorCtl.py", line 712, in _eventLoop

self._handleFn(timestamp, reply)

File "<home directory>/torflow.saved/torflow-3c0dd74/TorCtl/TorCtl.py", line 1337, in _handle1

self._map1.get(event.event_name, self.unknown_event)(event)

File "./op-addon.py", line 853, in stream_status_event

return self.handle_bw_test(s)

File "./op-addon.py", line 823, in handle_bw_test

lifespan = stream.lifespan(stream.bw_timestamp)

File "<home directory>/torflow.saved/torflow-3c0dd74/TorCtl/PathSupport.py", line 1326, in lifespan

return now-self.attached_at

TypeError: unsupported operand type(s) for -: 'NoneType' and 'float'

NOTICE[Thu Feb 02 17:45:58 2012]:Tor closed control connection. Exiting event thread.

Terminated

I am not sure how to resolve this ... I am not sure if I am doing something wrong or not...

Thanks

Sambuddho