https://github.com/iitis/iitis-generator

Software for distributed statistical evaluation of IEEE 802.11 wireless networks using Linux mac80211 packet injection facility
https://github.com/iitis/iitis-generator

Last synced: 9 months ago
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Software for distributed statistical evaluation of IEEE 802.11 wireless networks using Linux mac80211 packet injection facility

• Host: GitHub
• URL: https://github.com/iitis/iitis-generator
• Owner: iitis
• Created: 2011-06-04T11:31:46.000Z (about 15 years ago)
• Default Branch: master
• Last Pushed: 2011-12-22T12:33:22.000Z (over 14 years ago)
• Last Synced: 2025-01-14T14:03:43.280Z (over 1 year ago)
• Language: C
• Homepage: https://www.iitis.pl/~pjf/iitis-generator/doc/iitis-generator.1.html
• Size: 219 KB
• Stars: 4
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.markdown

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README

          
User Notes

==========

* Take care not to set the frequency such that `iw info' command shows "(radar detection)" next to

  it. There are WiFi channels for which frame injection is banned by the law.

* If using fixed transmission rate (as opposite to automatic selection by software), make sure the

  chosen bitrate is supported. Use `iw phy` and look for the "Bitrates" section in the output.

  * For the 2.4 GHz band, supported bitrates usually are: 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54

  * For the 5 GHz band, these are: 6, 9, 12, 18, 24, 36, 48, 54

Shortfalls

==========

* On RB433AH, with mac80211 packet injection, generator can do at most ~2500 pps (100 B frames) or no

  more than 25 Mbps (1500 B frames)

  * Simultaneous, parallel sendmsg() writes do not improve the performance - my guess is an

    architectural problem in packet injection facility that would require deeper investigation down

    the kernel, the mac80211 layer and the ath9k driver

  * A limited (in functionality) workaround would be to use the raw Ethernet or even UDP socket

    interface and rely on the Linux networking stack equipped with many layers of buffers

    * Would disable/degrade accurate control over frame timing, bitrate and ack