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GAIA VoIP traffic generator and analyzer. Presentation by Amrut Bang Ashish Deshpande Vijay Gabale Santosh Patil. Sponsored by. Pune Institute of Computer Technology. GS Lab Pvt. Ltd. Agenda. Problem definition Need/Motivation - PowerPoint PPT Presentation
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GAIA VoIP traffic generator and analyzer
Presentation by
Amrut Bang Ashish Deshpande Vijay Gabale Santosh Patil
Sponsored by
GS Lab Pvt. Ltd Pune Institute of Computer Technology
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Agenda Problem definition Need/Motivation Existing solutions & limitations Concept of VoIP traffic generator & analyzer Features Overall flow System architecture Immediate and long term goals References
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Problem Definition
To develop a system, for generating &
analyzing VoIP traffic, capable of simulating
multiple hosts on a single machine to test the
performance of server applications.
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Need
Every application requires testing before deployment. Why?
To check the performance and the actual handling capacity under varying loads.
A mechanism to create the practical working conditions and analyze the target’s behavior in it.
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A Real World Problem Small scale companies’ requirement.
To check scalability of the system.
Costs involved for multiple machines.
Complexity of maintaining network connections.
Real need : a N/W card and a software.
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Limitations of existing products Commercial Applications – Costly, only for Windows.
No open source tool to simulate multiple hosts on a
single machine for VoIP.
Applications only piecemeal, targeted at the developer.
Lack well structured & scriptable UI.
No comprehensive tool to support different codecs.
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Server
8Server
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Concept Generation of VoIP traffic, simulating multiple hosts on a
single machine.
Configuring & maintaining multiple different connections.
Analyzing the performance of target server application.
Precise measurement of testing parameters.
Generating reports and displaying results graphically.
Providing scriptable UI to help an expert.
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Abstract view of VoIP traffic generator and analyzer
Working of SIP Phone
SIPSIP
RTPRTP
UDPUDP
IPIP
EthernetEthernet
UserUser
KernelKernel
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List of ClientsList of Clients
Client 1Client 1 Client 2Client 2
RegisterRegister
Client nClient n………………..
Client nClient nClient 2Client 2Client 1Client 1
Client nClient nClient 2Client 2Client 1Client 1
Client1Client1 Client 2Client 2 Client nClient n…………………
…………………
…………………
Client 1Client 1 Client 2Client 2 Client nClient n…………………
ARP (IP Simulation)ARP (IP Simulation) Ethernet LayerEthernet Layer
Network HardwareNetwork Hardware
SIP
RTP
SIP
RTP
IPIP
UDPUDP
Client
IP Simulation
ARP broadcast
ARP response
Register request
172.16.0.21
172.16.0.21
172.16.0.23
172.16.0.23
172.16.0.22
172.16.0.22
172.16.0.5
172.16.0.5
Client Client
Server Server
Features Create multiple clients and maintain
communication between them. Generation & capture of various packets
(ARP,SIP, RTP). Calculation of different performance parameters Inputting load graphs Decide No. of clients, Codec selection Displaying server's response (Graph, Histogram,
Dial)
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Demo !
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Overall Flow
Shared DataShared Data
ScriptsScriptsGUIGUI
OperatorOperator
Packet Generation EnginePacket Generation EngineTarget ServerApplication
Target ServerApplicationPacket Capture &
Analysis
Packet Capture &Analysis
Shared DataShared Data
Displaying Server’sResponse
Displaying Server’sResponse
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Client Registration
Client Registration
Call Initiation and
Communication
Call Initiation and
Communication
Client State MachineClient State Machine
ConditionVariable
Signaling
ConditionVariable
Signaling
Processing Logic
Processing Logic
.
.
.
.
.
.
.
.
.
.
Pack1Pack1
Network HardwareNetwork Hardware
LIBPCAPLIBPCAP LIBNETLIBNET
N/2 N/2N
……..
………..
.
.Pack2Pack2
Receiving thread
Global Circular Buffer
Pack nPack n
Design Complexities
SIP stack implementation.
Efficient memory utilization.
pthread_mutex_trylock() instead of pthread_mutex_lock().
pthread_cond_timedwait().
OS Limitations:
- Thread constraints
- Maximum number of open files permitted
GAIA Offers…
Multiple clients on a single machine.
Real traffic through simulated clients
Starting calls at different times & making
them last for different durations.
Several codec formats & silent calls.
An entire VoIP network in a single box.
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Immediate Goals
Modifying libnet library to eliminate buffer copies.
Enhanced GUI and scriptable interface.
Kernel component.
Randomizing traffic generation.
Scaling up by increasing no. of clients.
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Long Term Goals
Incorporating more protocols.
Distributed load generation.
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References Jung Shr Vu, Per-Yuang Wang, “The performance analysis of SIP-T
signaling system in carrier class VoIP network”, Advanced Information Networking and Applications, ieeexplore.ieee.org
A. Pescape, S. Avallone, G. Venter,“Distributed Internet Traffic Generator (D-ITG) Analysis & Experimentation over heterogeneous networks,Accepted poster at ICNP,2003
Andrew Tanenbaum,”Computer Networks”,Pearson Education
Matthias Dalheimer,”Programming with Qt”, O’Reilly
Mathews,”Professional Linux Programming”
POSIX thread (pthread) library manuals
RFC 3261- SIP, RFC 1889- RTP, RFC 2327- SDP
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Thank you !