[kea-dev] perfdhcp bugfix

[Angelo Failla]

Found a problem when making some benchmark testing. The XID is incremented wrongly.
A XID should last for the duration of a SORA 4-way handshake...

However it doesn’t seem to be working properly:


    $ perfdhcp -4 -r 1 -n 2 -p 60 -t 1 -b mac=90:e2:ba:95:b9:28 10.88.45.33
    $ sudo tshark udp port 67
    Running as user "root" and group "root". This could be dangerous.
    Capturing on 'eth0'
      1   0.000000 10.35.166.47 -> 10.88.45.33  DHCP 295 DHCP Discover - Transaction ID 0x0
      2   0.030098  10.88.45.33 -> 10.35.166.47 DHCP 416 DHCP Offer    - Transaction ID 0x0
      3   0.030426 10.35.166.47 -> 10.88.45.33  DHCP 307 DHCP Request  - Transaction ID 0x1
      4   0.057158  10.88.45.33 -> 10.35.166.47 DHCP 416 DHCP ACK      - Transaction ID 0x1
      5   1.000689 10.35.166.47 -> 10.88.45.33  DHCP 295 DHCP Discover - Transaction ID 0x2
      6   1.027757  10.88.45.33 -> 10.35.166.47 DHCP 416 DHCP Offer    - Transaction ID 0x2
      7   1.027866 10.35.166.47 -> 10.88.45.33  DHCP 307 DHCP Request  - Transaction ID 0x3
      8   1.047429  10.88.45.33 -> 10.35.166.47 DHCP 416 DHCP ACK      - Transaction ID 0x3

I made a PR on github for this in case you want to take a look:

https://github.com/isc-projects/kea/pull/19
--
Angelo Failla
Cluster Infrastructure - Dublin
Pallotron at fb.com
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