#12757 NORM Future : XO-1 wireless scan results truncated by nearby mesh nodes

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#12757: XO-1 wireless scan results truncated by nearby mesh nodes
------------------------------+---------------------------------------------
           Reporter:  Quozl   |       Owner:                          
               Type:  defect  |      Status:  new                     
           Priority:  normal  |   Milestone:  Future Release          
          Component:  kernel  |     Version:  Software Build 13.2.0-13
         Resolution:          |    Keywords:                          
        Next_action:  code    |    Verified:  0                       
Deployment_affected:          |   Blockedby:                          
           Blocking:          |  
------------------------------+---------------------------------------------
Changes (by Quozl):

  * next_action:  communicate => code


Comment:

 XO-1.5 with 13.2.0-13 freshly installed, with debugging enabled, shows a
 hidden network with zero length SSID IE does cause the problem:
 {{{
 [  137.669756] libertas scan: scan response: 2 BSSs (190 bytes); resp size
 221 bytes
 [  137.669768] libertas SCAN_RSP: 4f 00 2c b0 5d a6 86 eb 1d 28 1d 0b 41
 05 00 00
 [  137.677737] libertas SCAN_RSP: 00 64 00 01 04 00 02 71 7a 01 08 82 84
 8b 96 0c
 [  137.685709] libertas SCAN_RSP: 12 18 24 03 01 06 07 06 41 55 20 01 0b
 14 2a 01
 [  137.693648] libertas SCAN_RSP: 04 32 04 30 48 60 6c dd 18 00 50 f2 02
 01 01 00
 [  137.701590] libertas SCAN_RSP: 00 03 a4 00 00 27 a4 00 00 42 43 5e 00
 62 32 2f
 [  137.709453] libertas SCAN_RSP: 00 6b 00 2e b0 5d a6 86 ec 1e 80 a3 0b
 41 05 00
 [  137.717473] libertas SCAN_RSP: 00 00 64 00 11 04[00 00]01 08 82 84 8b
 96 0c 12 <<
 [  137.725430] libertas SCAN_RSP: 18 24 03 01 06 05 04 00 02 00 00 07 06
 41 55 20
 [  137.733404] libertas SCAN_RSP: 01 0b 14 2a 01 04 32 04 30 48 60 6c dd
 16 00 50
 [  137.741402] libertas SCAN_RSP: f2 01 01 00 00 50 f2 04 01 00 00 50 f2
 04 01 00
 [  137.749268] libertas SCAN_RSP: 00 50 f2 01 dd 18 00 50 f2 02 01 01 00
 00 03 a4
 [  137.757295] libertas SCAN_RSP: 00 00 27 a4 00 00 42 43 5e 00 62 32 2f
 00
 [  137.764663] libertas SCAN_TSF: 13 01 10 00 a2 cc fc 86 04 00 00 00 01
 22 fd 86
 [  137.772647] libertas SCAN_TSF: 04 00 00 00
 [  137.777022] libertas scan: scan: 2c:b0:5d:a6:86:eb, capa 0401, chan  6,
 qz, -26 dBm
 [  137.777043] libertas scan: scan response: invalid IE fmt
 }}}

 The second BSSs contained:
 {{{
 len = 6b 00
 bssid = 2e b0 5d a6 86 ec
 rssi = 1e
 tsf = 80 a3 0b 41 05 00 00 00
 intvl = 64 00
 capa = 11 04
 ie = 00 00                          // SSID (zero length)
 ie = 01 08 82 84 8b 96 0c 12 18 24  // supported rates
 ie = 03 01 06                       // channel
 ie = 05 04 00 02 00 00
 ie = 07 06 41 55 20 01 0b 14        // country
 ie = 2a 01 04                       // ERP
 ie = 32 04 30 48 60 6c              // extended supported rates
 ie = dd 16 00 50 f2 01 01 00 00 50 f2 04 01 00 00 50 f2 04 01 00 00 50 f2
 01
 ie = dd 18 00 50 f2 02 01 01 00 00 03 a4 00 00 27 a4 00 00 42 43 5e 00 62
 32 2f 00
 }}}

 Therefore a hidden network can hide other networks that aren't hidden.

-- 
Ticket URL: <http://dev.laptop.org/ticket/12757#comment:9>
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