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Fathom: A Browser-based Network Measurement Platform
Christian Kreibich
International Computer Science Institute
Mohan Dhawan, Justin Samuel, Renata Teixeira, Mark Allman, Nick Weaver, Vern Paxson
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----------------------------------- Christian Kreibich - - PowerPoint PPT Presentation
----------------------------------- Christian Kreibich - - PowerPoint PPT Presentation
Fathom: A Browser-based Network Measurement Platform ----------------------------------- Christian Kreibich International Computer Science Institute Mohan Dhawan, Justin Samuel, Renata Teixeira, Mark Allman, Nick Weaver, Vern Paxson
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User-centric measurement
- Dasu
- Homenet Profiler
- Hostview
- Netalyzr
- Shaperprobe
- Speedtests
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User-centric measurement
- Dasu
- Homenet Profiler
- Hostview
- Netalyzr
- Shaperprobe
- Speedtests
Vuze plugin, Java Java app native app Java applet native app JavaScript, Flash
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A better platform?
+Everywhere +All the time ‒No real API ‒Security model
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Wouldn't this be sweet?
<html> <body> <script type=”text/javascript”> function tr_callback(results) { ... } measurements.traceroute(“google.com”, tr_callback); </script> </body> </html>
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Wouldn't this be sweet?
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Wouldn't this be sweet?
Quantify slowdown! Since when? CPU load? Location?
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The browser design space
- In-page JavaScript
- Pervasive, portable, lacking features
- Browser extensions
- User privileges, lacking portability
- Runtime plugins
- Portable, lacking features & security
- Custom plugins
- Powerful, large effort, lacking portability
- Browser changes
- Simply unrealistic
I n t r u s i v e n e s s
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Fathom:
A measurement platform for Firefox
- Just one browser, but ...
- ... very nice sweet-spot of features!
- Popular browser
- JavaScript-only extension ( open source)
- Portable (across Firefox's platforms)
- Extension need “only” control mediation
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Fathom?
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Fathom?
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Architecture
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API
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Security model: 5 mechanisms
- Client policy
- Defines conditions enabling API access
- User confirmation
- Not a great if relied upon heavily
- Script manifests
- Declares desired resources up-front
- Server manifests
- Controlled departure from same-origin policy
- Code signing
- Establishes identity, permission management
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- Demonstration
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- Conclusion
- Fathom: a browser-based
measurement platform
- Early stage, but usable
- Contribute! Code, interns,
browser gurus, ...
http://fathom.icsi.berkeley.edu