[Click] Why roofnet can not work on high rates

[欧阳鑫]

Thank you very much. I have patched. And this question has solved. I can run
roofnet on high rates.

2011/1/17 Roberto Riggio <roberto.riggio at create-net.org>

> You could also consider this (I'm the project maintainer):
>
> http://www.wing-project.org/
>
> It is a fork of roofnet and enhances it with several new features, most
> notably support multiple wireless interfaces and the WCETT routing metric.
>
> R.
>
> Il 17/01/2011 07:50, Robert Sombrutzki ha scritto:
>
> Hello,
>> we had the same problem using ath9k, which is part of the Compat-wireless
>> package (http://wireless.kernel.org/en/users/Download). We're using the
>> version 2010-12-16
>> (
>> http://wireless.kernel.org/download/compat-wireless-2.6/compat-wireless-2010-12-16.tar.bz2
>> )
>> and same patches from openwrt (backfire). Using this driver, which is
>> newer
>> than your driver (Ubuntu), rate selection using the radiotab header
>> doesn't
>> work, since the driver ignores the rates. The function "static bool
>> __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx,struct sk_buff
>> *skb)" in net/mac80211/tx.c considers the radiotap flags and nothing else.
>> There is already a patch to solve this problem:
>> https://patchwork.kernel.org/patch/43026/
>>
>> Best regards,
>> Robert
>>
>> On Montag, 17. Januar 2011, 欧阳鑫 wrote:
>>
>>> Hi, everyone.
>>>
>>>      I am running roofnet experiments on 2 Ubuntu hosts with 2.6.32-26
>>> kernel. Both are AR5416 cards with ath9k driver. All cards run in Monitor
>>> mode.
>>>
>>>      The problem is that hosts seems to be running under 1Mbps rate ONLY.
>>> Command "read srcr/es.bcast_stats" shows:
>>> 200 Read handler 'srcr/es.bcast_stats' OK
>>> DATA 363
>>> 5.167.1.211 00-25-86-A7-01-D3 seq 1295164746 period 30000 tau 300000 sent
>>> 12 last_rx 1.762133
>>> 5.167.1.211 00-25-86-A7-01-D3 [ 2 60 100 100 198 0 ]
>>> 5.167.1.211 00-25-86-A7-01-D3 [ 2 1500 100 100 197 0 ]
>>> 5.167.1.211 00-25-86-A7-01-D3 [ 4 1500 0 100 198 0 ]
>>> 5.167.1.211 00-25-86-A7-01-D3 [ 11 1500 0 100 196 0 ]
>>> 5.167.1.211 00-25-86-A7-01-D3 [ 22 1500 0 100 197 0 ]
>>>     I do not  know why fwd_rate with 2Mb/s, 5.5 Mb/s and 11 Mb/s are all
>>> 0s.
>>>
>>>     I forced the data rate to be 5.5Mbps by SetTXRate(11) on PC1, then
>>> ping
>>> PC1 on PC2, then I run tcpdump on PC2, the result is as follows:
>>> tcpdump -i wlan0 -n -e -xX
>>>
>>> 15:59:49.476661 5.5 Mb/s 63dBm tx power [0x00000010] DA:ff:ff:ff:ff:ff:ff
>>> SA:PC2-MAC  BSSID:00:00:00:00:00:00 LLC, dsap SNAP (0xaa) Individual,
>>> ssap
>>> SNAP (0xaa) Command, ctrl 0x03: oui Ethernet (0x000000), ethertype
>>> Unknown
>>> (0x0941): Unnumbered, ui, Flags [Command], length 1494
>>>         0x0000:  aaaa 0300 0000 0941 0200 87e4 3c00 0b00
>>>  .......A....<...
>>>         0x0010:  dc05 0000 05a7 01d3 0100 0000 75a5 324d
>>>  ............u.2M
>>>         0x0020:  3075 0000 e093 0400                      0u......
>>> 15:59:49.476661 1.0 Mb/s [0x0000000f] DA:ff:ff:ff:ff:ff:ff SA:PC2-MAC
>>> BSSID:00:00:00:00:00:00 LLC, dsap SNAP (0xaa) Individual, ssap SNAP
>>> (0xaa)
>>> Command, ctrl 0x03: oui Ethernet (0x000000), ethertype Unknown (0x0941):
>>> Unnumbered, ui, Flags [Command], length 1494
>>>         0x0000:  aaaa 0300 0000 0941 0200 87e4 3c00 0b00
>>>  .......A....<...
>>>         0x0010:  dc05 0000 05a7 01d3 0100 0000 75a5 324d
>>>  ............u.2M
>>>         0x0020:  3075 0000 e093 04                         0u.....
>>>
>>>  15:59:48.460612 5.5 Mb/s 63dBm tx power [0x00000010] DA:PC1-MAC
>>> SA:PC2-MAC
>>> BSSID:00:00:00:00:00:00 LLC, dsap SNAP (0xaa) Individual, ssap SNAP
>>> (0xaa)
>>> Command, ctrl 0x03: oui Ethernet (0x000000), ethertype Unknown (0x0943):
>>> Unnumbered, ui, Flags [Command], length 162
>>>         0x0000:  aaaa 0300 0000 0943 0b04 0101 0000 fc7b
>>>  .......C.......{
>>>         0x0010:  0000 0054 0000 0000 0000 0000 0000 0000 ...T............
>>>         0x0020:  0000 0000 0000 0000
>>> ........
>>> 15:59:48.460612 1.0 Mb/s [0x0000000f] DA:PC1-MAC  SA:PC2-MAC
>>> BSSID:00:00:00:00:00:00 LLC, dsap SNAP (0xaa) Individual, ssap SNAP
>>> (0xaa)
>>> Command, ctrl 0x03: oui Ethernet (0x000000), ethertype Unknown (0x0943):
>>> Unnumbered, ui, Flags [Command], length 162
>>>         0x0000:  aaaa 0300 0000 0943 0b04 0101 0000 fc7b
>>> .......C.......{
>>>         0x0010:  0000 0054 0000 0000 0000 0000 0000 0000
>>> ...T............
>>>         0x0020:  0000 0000 0000 00
>>> .......
>>>   It seemed that each packet was caught by tcpdump 2 times, and the 2
>>> copies share the same timestamp but different rates.
>>>
>>>   My second question is why each packet was caught with a rate of 5.5Mb/s
>>> first, and then with a rate of 1Mb/s.
>>>
>>>   The attachment is my configuration file: gen_config_roofnet.pl. I do
>>> not
>>> know if there is some error with the configuration file. Would you help
>>> me
>>> check for it?
>>>
>>>  Thank you very much!
>>>
>>
>>
>