# This file contains information for configuring the test_netemul extension.
# To find how to have freeDiameter load this extension, please refer to the freeDiameter documentation.
#
# The test_netemul extension implements a Diameter proxy that behaves like simple forwarding agent,
# with the exception that it can introduce delay in the forwarding of the messages and generate duplicates
# of messages, as can be expected from a real Diameter network. It can also generate routing errors when 
# connected to more than 2 peers.


# LATENCY:
# Two parameters are used to control the delay introduced in the messages.
#  - latency_average:
#   This is the average delay introduced in the packets. 
#   Set to 0 to not add any latency (beyond the normal processing time).
#   The value is expressed as an integer followed by a unit which can 
#   be 's' (seconds) or 'ms' (milliseconds). Example:
#     latency_average = 700 ms;
#
#  - latency_deviation:
#   This parameter controls the variance in the latency. It is expressed
#   as a value between 0 % and 100 %. When set to 0 %, all messages will be delayed
#   by exactly latency_average. Otherwise, it represents the width of the interval 
#   "around" the average where "most" of the latency will be chosen (the distribution
#   has a Gaussian shape). Example:
#      latency_deviation = 25 %;
#
# The default values give an added latency "mostly" between 0.4 and 0.6 seconds:
#  latency_average  = 500 ms;
#  latency_deviation = 20 % ;


# REORDERING:
# There is no special control over the reordering of messages. It may simply happen
# as a result of the latency. If you want to get a lot of reordering, set the 
# latency_variance to a high value.


# DUPLICATES:
# Duplicate messages are expected in the Diameter protocol by design, as a consequence
# of the failover mechanism that provides the protocol's reliability.
#  - dupl_proba:
#   This value gives the probability of producing a duplicate of a forwarded message. 
#   The value is comprized between 0 (no duplicates) and 1 (duplicate all messages).
#   Duplicates are created for requests, but may result in duplicate answers 
#   received by your Diameter client(s), depending on your server(s)'s behavior.
#   In the case of freeDiameter client, the duplicate answer is automatically filtered out
#   because the hop-by-hop id has already been used.
#   Note that each duplicate copy is an independent message,
#   which receives a different latency, and might be routed to a different server if you
#   use for example load-balancing.
#   The parameter can take several forms:
#    dupl_proba = 0 ;
#      Disables the generation of duplicate messages completely.
#    dupl_proba = 1 / 10000 ;
#    dupl_proba = 0.0001 ;
#      Around 1 messages over ten thousands will be duplicated.
#
# Default value:
#  dupl_proba = 1 / 100 ;