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+# Utility applications
+
+## Introduction
+
+hicn-ping-server, hicn-ping-client and hiperf are three utility applications for testing and benchmarking stack.
+
+## Using hICN Utils applications
+
+### Platforms
+
+hicn-light has been tested in:
+
+- Ubuntu 16.04 / 18.04 (x86_64)
+- Debian Testing
+- Centos 7
+- MacOSX 10.12
+- Android
+- iOS
+
+### Dependencies
+
+Build dependencies:
+
+- c++14 ( clang++ / g++ )
+- CMake 3.4
+
+Basic dependencies:
+
+- ppenSSL
+- pthreads
+- libevent
+- libparc
+- libhicntransport
+
+## Executables
+
+The utility applications are a set of binary executables consisting of a client/server ping applications (hicn-ping-server and hicn-ping-client) and a hicn implementation of hicn (hiperf).
+
+### hicn-ping-server
+
+The command `hicn-ping-server` runs the server side ping application. hicn-ping-server can be executed
+with the following options:
+
+```
+usage: hicn-ping-server [options]
+
+Options:
+-s <content_size>           = object content size (default 1350B)
+-n <hicn_name>              = hicn name (default b001::/64)
+-f                          = set tcp flags according to the flag received (default false)
+-l <lifetime>               = data lifetime
+-r                          = always reply with a reset flag (default false)
+-t <ttl>                    = set ttl (default 64)
+-V                          = verbose, prints statistics about the messagges sent and received (default false)
+-D                          = dump, dumps sent and received packets (default false)
+-q                          = quite, not prints (default false)
+-d                          = daemon mode
+-H                          = help
+
+Example:
+hicn-ping-server -n c001::/64
+```
+
+### hicn-ping-client
+
+The command `hicn-ping-client` runs the client side ping application. hicn-ping-client can be executed
+with the following options:
+
+```
+usage: hicn-ping-client [options]
+
+Options:
+-i <ping_interval>          = ping interval in microseconds (default 1000000ms)
+-m <max_pings>              = maximum number of pings to send (default 10)
+-s <source_port>            = source port (default 9695)
+-d <destination_port>       = destination port (default 8080)
+-t <ttl>                    = set packet ttl (default 64)
+-O                          = open tcp connection (three way handshake) (default false)
+-S                          = send always syn messages (default false)
+-A                          = send always ack messages (default false)
+-n <hicn_name>              = hicn name (default b001::1)
+-l <lifetime>               = interest lifetime in milliseconds (default 500ms)
+-V                          = verbose, prints statistics about the messagges sent and received (default false)
+-D                          = dump, dumps sent and received packets (default false)
+-q                          = quiet, not prints (default false)
+-H                          = help
+
+Example:
+hicn-ping-client -n c001::1
+```
+
+### hiperf
+
+The command `hiperf` is a tool for performing network throughput measurements with hicn. It can be executed as server or client using the following options:
+
+```
+usage: hiperf [-S|-C] [options] [prefix|name]
+
+Options:
+-D                          = run as a daemon
+-R                          = run RTC protocol (client or server)
+-f <ouptup_log_file>        = output log file path
+
+Server specific:
+-A <download_size>          = size of the content to publish. This is not the size of the packet (see -s for it)
+-s <payload_size>           = size of the payload of each data packet
+-r                          = produce real content of content_size bytes
+-m                          = produce transport manifest
+-l                          = start producing content upon the reception of the first interest
+-k <keystore_path>          = path of p12 file containing the crypto material used for signing the packets
+-y <hash_algorithm>         = use the selected hash algorithm for calculating manifest digests
+-p <password>               = password for p12 keystore
+-x                          = produce a content of <download_size>, then after downloading it produces a new content of
+					          <download_size> without resetting the suffix to 0
+-B	<bitrate>			          = bitrate for RTC producer, to be used with the -R option, in kbps (example: 64kbps)
+
+Client specific:
+-b <beta_parameter>         = RAAQM beta parameter
+-d <drop_factor_parameter>  = RAAQM drop factor parameter
+-M                          = store the content downloaded (default false)
+-W <window_size>            = use a fixed congestion window for retrieving the data
+-c <certificate_path>       = path of the producer certificate to be used for verifying the origin of the packets received
+-i <stats_interval>         = show the statistics every <stats_interval> milliseconds
+-v                          = Enable verification of received data
+
+Example:
+hiperf -S c001::/64
+```
+
+## How To Benchmark Client-Server Throughput using hiperf
+
+### hicn-light-daemon
+
+This tutorial will explain how to configure a simple client-server topology and retrieve network measurements using the hiperf utility.
+
+We consider this simple topology, consisting on two linux VM which are able to communicate through an IP network (you can also use containers or physical machines):
+
+```text
+|client (10.0.0.1/24; 9001::1/64)|======|server (10.0.0.2/24; 9001::2/64)|
+```
+
+Install the hICN suite on two linux VM. This tutorial makes use of Ubuntu 18.04, but it could easily be adapted to other platforms.
+You can either install the hICN stack using binaries or compile the code. In this tutorial we will build the code from source.
+
+```bash
+$ curl -s https://packagecloud.io/install/repositories/fdio/release/script.deb.sh | sudo bash
+$ apt-get install -y git \
+                    cmake \
+                    build-essential \
+                    libasio-dev \
+                    libcurl4-openssl-dev \
+                    libparc-dev \
+                    --no-install-recommends
+
+$ mkdir hicn-suite && cd hicn-suite
+$ git clone https://github.com/FDio/hicn hicn-src
+$ mkdir hicn-build && cd hicn-build
+$ cmake ../hicn-src -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=../hicn-install -DBUILD_APPS=ON
+$ make -j 4 install
+$ export HICN_ROOT=${PWD}/../hicn-install
+```
+
+It should install the hICN suite under hicn-install.
+
+#### hICN stack based on hicn-light forwarder with UDP faces
+
+##### Server Configuration
+
+Create a configuration file for the hicn-light forwarder. Here we are configuring UDP faces.
+
+```bash
+server$ mkdir -p ${HICN_ROOT}/etc
+server$ LOCAL_IP="10.0.0.1" # Put here the actual IPv4 of the local interface
+server$ LOCAL_PORT="12345"
+server$ cat << EOF > ${HICN_ROOT}/etc/hicn-light.conf
+add listener udp list0 ${LOCAL_IP} ${LOCAL_PORT}
+EOF
+```
+
+Start the hicn-light forwarder
+
+```bash
+server$ sudo ${HICN_ROOT}/bin/hicn-light-daemon --daemon --capacity 0 --log-file ${HICN_ROOT}/hicn-light.log --config ${HICN_ROOT}/etc/hicn-light.conf
+```
+
+We set the forwarder capacity to 0 because we want to measure the end-to-end performance without retrieving any data packet from intermediate caches.
+
+Run the [hiperf](#hiperf) server.
+
+```bash
+server$ ${HICN_ROOT}/bin/hiperf -S b001::/64
+```
+
+The hiperf server will register the prefix b001::/64 on the local forwarder and will reply with pre-allocated data packet.  In this test we won't consider segmentation and reassembly cost.
+
+##### Client Configuration
+
+Create a configuration file for the hicn-light forwarder at the client. Here we are configuring UDP faces.
+
+```bash
+client$ mkdir -p ${HICN_ROOT}/etc
+client$ LOCAL_IP="10.0.0.2" # Put here the actual IPv4 of the local interface
+client$ LOCAL_PORT="12345"
+client$ REMOTE_IP="10.0.0.1" # Put here the actual IPv4 of the remote interface
+client$ REMOTE_PORT="12345"
+client$ cat << EOF > ${HICN_ROOT}/etc/hicn-light.conf
+add listener udp list0 ${LOCAL_IP} ${LOCAL_PORT}
+add connection udp conn0 ${REMOTE_IP} ${REMOTE_PORT} ${LOCAL_IP} ${LOCAL_PORT}
+add route conn0 b001::/16 1
+EOF
+```
+
+Run the hicn-light forwarder
+
+```bash
+client$ sudo ${HICN_ROOT}/bin/hicn-light-daemon --daemon --capacity 1000 --log-file ${HICN_ROOT}/hicn-light.log --config ${HICN_ROOT}/etc/hicn-light.conf
+```
+
+Run the [hiperf](#hiperf) client:
+
+```bash
+client$ ${HICN_ROOT}/bin/hiperf -C b001::1 -W 50
+EOF
+```
+
+This will run the client with a fixed window of 50 interests.
+
+#### Using hicn-light forwarder with hICN faces
+
+For sending hICN packets directly over the network, using hicn faces, change the configuration of the two forwarders and restart them.
+
+##### Server Configuration
+
+```bash
+server$ mkdir -p ${HICN_ROOT}/etc
+server$ LOCAL_IP="9001::1"
+server$ cat << EOF > ${HICN_ROOT}/etc/hicn-light.conf
+add listener hicn lst 0::0
+add punting lst b001::/16
+add listener hicn list0 ${LOCAL_IP}
+EOF
+```
+
+#### Client Configuration
+
+```bash
+client$ mkdir -p ${HICN_ROOT}/etc
+client$ LOCAL_IP="9001::2"
+client$ REMOTE_IP="9001::1"
+client$ cat << EOF > ${HICN_ROOT}/etc/hicn-light.conf
+add listener hicn lst 0::0
+add punting lst b001::/16
+add listener hicn list0 ${LOCAL_IP}
+add connection hicn conn0 ${REMOTE_IP} ${LOCAL_IP}
+add route conn0 b001::/16 1
+EOF
+```
+
+### vpp based hicn-plugin
+
+Compile the hicn stack enabling the [vpp](https://github.com/FDio/vpp) support.
+
+In this example we will do a local hiperf client-server communication.
+
+```bash
+$ curl -s https://packagecloud.io/install/repositories/fdio/release/script.deb.sh | sudo bash
+$ apt-get install -y git \
+                    cmake \
+                    build-essential \
+                    libasio-dev \
+                    libcurl4-openssl-dev \
+                    libparc-dev \
+                    vpp libvppinfra vpp-plugin-core vpp-dev python3-ply python python-ply \
+                    --no-install-recommends
+
+$ mkdir hicn-suite && cd hicn-suite
+$ git clone https://github.com/FDio/hicn hicn-src
+$ mkdir hicn-build && cd hicn-build
+$ cmake ../hicn-src -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_APPS=ON -DBUILD_HICNPLUGIN=ON
+$ sudo make -j 4 install
+$ export HICN_ROOT=${PWD}/../hicn-install
+```
+
+Make sure vpp is running:
+
+```bash
+$ sudo systemctl restart vpp
+```
+
+Run the hicn-plugin:
+
+```bash
+$ vppctl hicn control start
+```
+
+Run hiperf server:
+
+```bash
+$ hiperf -S b001::/64
+```
+
+Run hiperf client:
+
+```bash
+$ hiperf -C b001::1 -W 300
+```
+
+## License
+
+This software is distributed under the following license:
+
+```
+Copyright (c) 2017-2019 Cisco and/or its affiliates.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at:
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```